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Fedorov, A. S.
Charge transfer plasmons in nanoparticle arrays on graphene: Theoretical development / A. S. Fedorov, E. V. Eremkin // J. Appl. Phys. - 2024. - Vol. 136, Is. 4. - Ст. 043101, DOI 10.1063/5.0206742. - Cited References: 35. - This study was supported by the Russian Science Foundation under Agreement No. 23-12-20007 and the Government of the Krasnoyarsk Territory and the Krasnoyarsk Territorial Foundation for the support of Scientific and R&D Activities under Agreement No. 256 . - ISSN 0021-8979. - ISSN 1089-7550
Аннотация: The properties of charge transfer plasmons (CTPs) in periodic metallic nanoparticle arrays (PMNPAs) on the single-layer graphene surface are studied within a computationally efficient original hybrid quantum-classical model. The model is based on the proven assumption that the carrier charge density in doped graphene remains unchanged under plasmon oscillations. Calculated CTP frequencies for two PMNPA geometries are shown to lie within the THz range and to be factorized, i.e., presented as a product of two independent factors determined by the graphene charge density and the PMNPA geometry. Equations are derived for describing the CTP frequencies and eigenvectors, i.e., oscillating nanoparticle charge values. It is shown that the CTP plasmons having a band structure containing a wave vector and a band number, like to phonons in periodic media, can be divided into an acoustic mode and optical CTP modes. For the acoustic modes, the CTP group velocity tends to zero at k → 0, but reaches a value of ~ VFermi in graphene inside the Brillouin zone, while for the optical modes, the group velocity dispersion is extremely weak, although their energy is higher than the acoustic plasmon energies. It is shown that the calculated dependence of CTP frequencies on the carrier concentration in graphene is in good agreement with experimental data. We believe that the proposed model can help in designing various graphene-based terahertz nanoplasmonic devices of complex geometry due to very high computational efficiency.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
International Research Center of Spectroscopy and Quantum Chemistry—IRC SQC, Siberian Federal University, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Eremkin, E. V.; Федоров, Александр Семенович
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Room temperature ferromagnetism in graphene/SiC(0001) system intercalated by Fe and Co / S. O. Filnov, D. A. Estyunin, I. I. Klimovskikh [et al.] // Phys. Status Solidi - Rapid Res. Lett. - 2024. - Vol. 18, Is. 3. - Ст. 2300336, DOI 10.1002/pssr.202300336. - Cited References: 76. - This research was funded by the Ministry of Science and Higher Education of the Russian Federation grant no. 075-15-2020-797 (13.1902.21.0024) . - ISSN 1862-6254. - ISSN 1862-6270
Аннотация: The utilization of graphene on silicon carbide (SiC) substrates holds substantial promise for advancements in spintronics and nanoelectronics. Furthermore, incorporating magnetic metals provides an optimal framework for probing fundamental physical phenomena. The approach to developing such systems is in situ intercalation of graphene with magnetic metals. Herein, the electronic structure is analyzed and the magnetic properties of the system are synthesized by the thermal decomposition of 6H-SiC(0001) surface and subsequent intercalation of graphene with cobalt (Co) and iron (Fe) atoms. X-ray photoemission spectroscopy and low-energy electron diffraction are employed to control the synthesis and metal intercalation processes. The morphological characteristics of the synthesized system are studied by means of atomic force microscopy. The findings derived from magneto-optic Kerr effect measurements reveal a homogeneous ferromagnetic ordering at room temperature. Angle-resolved photoemission spectroscopy is used to ascertain the impact of intercalation on graphene's electronic structure. The results of this study are essential for the development of graphene-based spintronics and nanoelectronic devices as well as for fundamental studies in magnetic graphene systems.

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Держатели документа:
Saint Petersburg State University, Saint Petersburg, 198504, Russian Federation
Donostia International Physics Center, Donostia-San Sebastian, 20018, Spain
Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Kol'tsovo, 630559, Russian Federation
National Research Center “Kurchatov Institute”, Moscow, 123182, Russian Federation

Доп.точки доступа:
Filnov, S. O.; Estyunin, D. A.; Klimovskikh, I. I.; Estyunina, T. P.; Golyashov, V. A.; Tarasov, A. S.; Тарасов, Антон Сергеевич; Kosyrev, N. N.; Косырев, Николай Николаевич; Komarov, V. A.; Комаров, Василий Андреевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Rybkina, A. A.; Vilkov, O. Yu.; Shikin, A. M.; Tereshchenko, O. E.; Chumakov, R. G.; Lebedev, A. M.; Rybkin, A. G.
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A hybrid quantum–classical theory for predicting terahertz charge-transfer plasmons in metal nanoparticles on graphene / A. S. Fedorov, E. V. Eremkin, P. O. Krasnov [et al.] // J. Chem. Phys. - 2024. - Vol. 160, Is. 4. - Ст. 044117, DOI 10.1063/5.0178247. - Cited References: 61. - This study was funded by the Ministry of Science and High Education of Russian Federation, Project No. FSRZ-2023-0006. The calculations of CTPs in specific NP–graphene complexes were performed within the RSF Grant No. 23-12-20007 and the Krasnoyarsk Territorial Foundation for Support of Scientific and R & D Activities, Agreement No. 256. H. Ågren was supported by the Swedish Science Research Council on Contract No. 2022-03405 . - ISSN 0021-9606. - ISSN 1089-7690
Аннотация: Metal nanoparticle (NP) complexes lying on a single-layer graphene surface are studied with a developed original hybrid quantum–classical theory using the Finite Element Method (FEM) that is computationally cheap. Our theory is based on the motivated assumption that the carrier charge density in the doped graphene does not vary significantly during the plasmon oscillations. Charge transfer plasmon (CTP) frequencies, eigenvectors, quality factors, energy loss in the NPs and in graphene, and the absorption power are aspects that are theoretically studied and numerically calculated. It is shown the CTP frequencies reside in the terahertz range and can be represented as a product of two factors: the Fermi level of graphene and the geometry of the NP complex. The energy losses in the NPs are predicted to be inversely dependent on the radius R of the nanoparticle, while the loss in graphene is proportional to R and the interparticle distance. The CTP quality factors are predicted to be in the range ~ 10 – 100. The absorption power under CTP excitation is proportional to the scalar product of the CTP dipole moment and the external electromagnetic field. The developed theory makes it possible to simulate different properties of CTPs 3–4 orders of magnitude faster compared to the original FEM or the finite-difference time domain method, providing possibilities for predicting the plasmonic properties of very large systems for different applications.

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Держатели документа:
International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, 660041 Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Computational Modeling SB RAS, 660036 Krasnoyarsk, Russia
Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Eremkin, E. V.; Krasnov, P. O.; Gerasimov, V. S.; Agren, H.; Polyutov, S. P.
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Wavelength- and angle-selective photodetectors enabled by graphene hot electrons with Tamm plasmon polaritons / C.-H. Huang, C.-H. Wu, R. G. Bikbaev [et al.] // Nanomaterials. - 2023. - Vol. 13, Is. 4. - Ст. 693, DOI 10.3390/nano13040693. - Cited References: 50. - This work is supported by the Higher Education Sprout Project of the National Yang Ming Chiao Tung University, National Tsing Hua University, Ministry of Education and the National Science and Technology Council (NSTC 110-2221-E-007-130-MY3; 109-2628-E-007-003-MY3; 111-2923-E-007-008-MY3; 111-2628-E-007-021; 111-2119-M-A49-006). This research was funded by the Russian Science Foundation (project no. 22-42-08003) . - ISSN 2079-4991
Кл.слова (ненормированные):
2D material -- Tamm plasmon polariton -- distributed Bragg reflector -- graphene -- photodetectors -- wavelength and angle selectivity -- LiDAR
Аннотация: Recently, two-dimensional materials have attracted attention owing to their special optical characteristics and miniaturization, with low thickness as well as extremely high responsivity. Additionally, Tamm plasmon polariton (TPP) resonance can be observed by combining a metal film and a one-dimensional (1D) photonic crystal (PC), where an electric field confinement is located at the metal–1D PC interface. In this study, a graphene layer combined with a TPP is proposed as a wavelength- and angle-selective photodetector. The graphene layer is located where the strong field confinement occurs, and the photocurrent response is significantly enhanced with increasing absorption by over four times (from 62.5 μA⋅W−1 to 271 μA⋅W−1 and undetected state to 330 μA⋅W−1 in two different samples). Moreover, the graphene–TPP photodetector has wavelength and angle selectivity, which can be applied in LiDAR detecting, sun sensors, laser beacon tracking, and navigational instruments in the future.

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Держатели документа:
Institute of Photonic System, National Yang Ming Chiao Tung University, 301 Sec. 2, Gaofa 3rd Road, Tainan 711010, Taiwan
College of Photonics, National Yang Ming Chiao Tung University, 301 Sec. 2, Gaofa 3rd Road, Tainan 711010, Taiwan
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Siberian Federal University, 660041 Krasnoyarsk, Russia
Institute of Imaging and Biomedical Photonics, National Yang Ming Chiao Tung University, 301 Sec. 2, Gaofa 3rd Road, Tainan 711010, Taiwan
Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan

Доп.точки доступа:
Huang, Cheng-Han; Wu, Chia-Hung; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Ye, Ming-Jyun; Chen, Chi-Wen; Wang, Tung-Jung; Timofeev, I. V.; Тимофеев, Иван Владимирович; Lee, Wei; Chen, Kuo-Ping
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Synthesizing antiferromagnetic α-Fe2O3–rGO discs: Their magnetic and magneto-optical properties / A. V. Kurilova, A. E. Sokolov, A. L. Sukhachev [et al.] // Bull. Russ. Acad. Sci. Phys. - 2022. - Vol. 86, Is. 5. - P. 610-613, DOI 10.3103/S106287382205015X. - Cited References: 26 . - ISSN 1062-8738
Кл.слова (ненормированные):
Hematite -- Optical properties -- Antiferromagnetics -- Graphene layers -- Hematite nanoparticles -- Hybrid structure -- Magnetic and magneto-optical properties -- Reduced graphene oxides -- Uniform distribution
Аннотация: A comprehensive study is performed of the properties of hybrid structures of iron oxide and reduced graphene oxide α-Fe2O3/rGO synthesized via “wet mixing.” It is shown that hematite nanoparticles with a comparatively uniform distribution can be encapsulated in graphene layers, and the way of preparing precursors is of critical importance in shaping the magneto-optical properties of α-Fe2O3/rGO hybrid structures.

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Публикация на русском языке Синтез, магнитные и магнитооптические свойства антиферромагнитных нанодисков α-Fe2O3–rGO [Текст] / А. В. Курилова, А. Э. Соколов, А. Л. Сухачев [и др.] // Изв. РАН. Сер. физич. - 2022. - Т. 86 № 5. - С. 726-729

Держатели документа:
ITMO National Research University, St. Petersburg, 197101, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kurilova, A. V.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Ivanova, O. S.; Иванова, Оксана Станиславовна; Bogdanov, K. V.; Baranov, M. A.; Dubavik, A. Y.
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Triple VTe2/graphene/VTe2 heterostructures as perspective magnetic tunnel junctions / L. V. Begunovich, A. V. Kuklin, M. A. Visotin [et al.] // Appl. Surf. Sci. - 2020. - Vol. 510. - Ст. 145315, DOI 10.1016/j.apsusc.2020.145315. - Cited References: 67. - This work was supported by the government contract of the Ministry of Science and Higher Education of the Russian Federation to Siberian Federal University (Grant No. 16.1455.2017/PCh ) and Russian Foundation for Basic Research , Government of Krasnoyarsk Territory , Krasnoyarsk Regional Fund of Science to the research project: “Quantum chemical modeling of Bychkov-Rashba interfaces based on transition metal compounds and nanoscaled organic fragments”. P.V.A. and A.V.K. gratefully acknowledges the financial support of National Research Foundation of Republic of Korea for support under Grant No. NRF-2017R1A2B4004440 . A.V.K. also acknowledges the US Air Force Office of Scientific Research (contract FA-9550-18-1-0032) for support. The authors would like to thank Information Technology Center, Novosibirsk State University, Institute of Computational Modelling of SB RAS, Krasnoyarsk for providing the access to supercomputer facilities, and Irkutsk Supercomputer Center of SB RAS for providing the access to HPC-cluster “Akademik V.M. Matrosov” (Irkutsk Supercomputer Center of SB RAS, Irkutsk: ISDCT SB RAS; http://hpc.icc.ru, accessed 13.05.2019 ) . - ISSN 0169-4332
Кл.слова (ненормированные):
Magnetic tunnel junction -- Vanadium ditelluride monolayer -- Transition metal dichalcogenides -- Graphene -- Density functional theory
Аннотация: New perspective 1.4 nm thick spin-polarized triple heterostructures based on graphene sandwiched between two vanadium ditelluride monolayers (VTe2/graphene/VTe2) were studied using ab initio DFT technique. Both possible trigonal prismatic (H-VTe2) and octahedral (T-VTe2) VTe2 phases were considered to design and study graphene-based heterostructures. It was shown that the interaction with graphene changes the electronic structure of 2D T-VTe2 from metallic to half-metallic, making T phase perspective to be used for magnetic tunnel junctions. The electronic subsystem of graphene fragment is slightly hole doped. Calculated tunnel magnetoresistance ratio for the favorable heterostructure configuration estimated within the Julliere model is 220%, which opens a way to use VTe2/graphene/VTe2 as prospective magnetic tunnel junction in novel spintronic nanodevices based on tunnel magnetic resistance and spin transfer torque effects.

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Держатели документа:
Siberian Federal University, 79 Svobodny Av., Krasnoyarsk, 660041, Russian Federation
Department of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Royal Institute of Technology, Stockholm, SE-10691, Sweden
Kirensky Institute of Physics SB RAS, 50-38 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Department of Chemistry, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, South Korea

Доп.точки доступа:
Begunovich, L. V.; Kuklin, A. V.; Visotin, M. A.; Высотин, Максим Александрович; Kuzubov, A. A.; Tomilin, F. N.; Томилин, Феликс Николаевич; Tarasov, A. S.; Тарасов, Антон Сергеевич; Mikhalev, Y. G.; Avramov, P. V.
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Two-dimensional hexagonal CrN with promising magnetic and optical properties: A theoretical prediction / A. V. Kuklin [et al.] // Nanoscale. - 2017. - Vol. 9, Is. 2. - P. 621-630, DOI 10.1039/c6nr07790k. - Cited References: 76. - We acknowledge the Siberian Supercomputer Center (SSCC) of SB RAS, Novosibirsk; the Institute of Computational Modeling of SB RAS, Krasnoyarsk; the Joint Supercomputer Center of RAS, Moscow; and the ICC of Novosibirsk State University for providing the computing resources. This work was supported by the government contract of the Ministry of Education and Science of the Russian Federation to Siberian Federal University (Grant No. 16.1500.2014/K). P. V. A. acknowledges the Kyungpook National University Research Fund, 2014. N. S. M. acknowledges the Russian Foundation for Basic Research (RFBR 16-32-60003 mol_a_dk). . - ISSN 2040-3364
Кл.слова (ненормированные):
Boron nitride -- Calculations -- Energy gap -- Ferromagnetic materials -- Ferromagnetism -- Graphene -- Magnetism -- Metals -- Transition metals -- Transparency -- Dielectric functions -- Ferromagnetic orderings -- First-principles calculation -- Half-metallic properties -- Magnetic and optical properties -- Optical transparency -- Spintronics application -- Transition metal dichalcogenides -- Optical properties
Аннотация: Half-metallic ferromagnetic materials with planar forms are promising for spintronics applications. A wide range of 2D lattices like graphene, h-BN, transition metal dichalcogenides, etc. are non-magnetic or weakly magnetic. Using first principles calculations, the existence of graphene-like hexagonal chromium nitride (h-CrN) with an almost flat atomically thin structure is predicted. We find that freestanding h-CrN has a 100% spin-polarized half-metallic nature with possible ferromagnetic ordering and a high rate of optical transparency. As a possible method for stabilization and synthesis, deposition of h-CrN on 2D MoSe2 or on MoS2 is proposed. The formation of composites retains the half-metallic properties and leads to the reduction of spin-down band gaps to 1.43 and 1.71 eV for energetically favorable h-CrN/MoSe2 and h-CrN/MoS2 configurations, respectively. Calculation of the dielectric functions of h-CrN, h-CrN/MoSe2 and h-CrN/MoS2 exhibit the high transparency of all three low-dimensional nanomaterials. The honeycomb CrN may be considered as a promising fundamental 2D material for a variety of potential applications of critical importance. © The Royal Society of Chemistry 2017.

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
Department of Chemistry, Kyungpook National University, 80 Daehakro Bukgu, Daegu, South Korea
L.V. Kirensky Institute of Physics, 50/38 Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Kuklin, A. V.; Куклин, Артем Валентинович; Kuzubov, A. A.; Кузубов, Александр Александрович; Kovaleva, E. A.; Mikhaleva, N. S.; Tomilin, F. N.; Томилин, Феликс Николаевич; Lee, H.; Avramov, P. V.
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The direct exchange mechanism of induced spin polarization of low-dimensional π-conjugated carbon- and h-BN fragments at LSMO(001) MnO-terminated interfaces / A. V. Kuklin [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P. 23-29, DOI 10.1016/j.jmmm.2016.12.096. - Cited References:70. - We acknowledge the Siberian Supercomputer Center (SSCC) of SB RAS, Novosibirsk; the Joint Supercomputer Center of RAS, Moscow and the ICC of Novosibirsk State University for providing the computing resources. Russian Science Foundation (Grant No 14-13-00139) supported the work of Russian team. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
HEXAGONAL BORON-NITRIDE
   THIN-FILMS
   GIANT MAGNETORESISTANCE
   METALLIC
Кл.слова (ненормированные):
Graphene nanoribbons -- DFT -- LSMO thin films -- Induced spin polarization -- h-BN nanoribbons -- Half-metal
Аннотация: Induced spin polarization of π-conjugated carbon and h-BN low dimensional fragments at the interfaces formed by deposition of pentacene molecule and narrow zigzag graphene and h-BN nanoribbons on MnO2-terminated LSMO(001) thin film was studied using GGA PBE+U PAW D3-corrected approach. Induced spin polarization of π-conjugated low-dimensional fragments is caused by direct exchange with Mn ions of LSMO(001) MnO-derived surface. Due to direct exchange, the pentacene molecule changes its diamagnetic narrow-band gap semiconducting nature to the ferromagnetic semiconducting state with 0.15 eV energy shift between spin-up and spin-down valence bands and total magnetic moment of 0.11 μB. Direct exchange converts graphene nanoribbon to 100% spin-polarized half-metal with large amplitude of spin-up electronic density at the Fermi level. The direct exchange narrows the h-BN nanoribbon band gap from 4.04 to 1.72 eV in spin-up channel and converts the h-BN ribbon semiconducting diamagnetic nature to a semiconducting magnetic one. The electronic structure calculations demonstrate a possibility to control the spin properties of low-dimensional π-conjugated carbon and h-BN fragments by direct exchange with MnO-derived LSMO(001) surface for spin-related applications.

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Доп.точки доступа:
Kuklin, A. V.; Kuzubov, A. A.; Кузубов, Александр Александрович; Kovaleva, E. A.; Ковалева, Евгения Андреевна; Lee, Hyosun; Sorokin, Pavel B.; Sakai, Seiji; Entani, Shiro; Naramoto, Hiroshi; Avramov, P. V.; Аврамов, Павел Вениаминович; Russian Science Foundation [14-13-00139]; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
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VS2/7graphene heterostructures as promising anode material for Li-ion batteries / N. S. Mikhaleva [et al.] // J. Phys. Chem. C. - 2017. - Vol. 121, Is. 43. - P. 24179-24184, DOI 10.1021/acs.jpcc.7b07630. - Cited References: 64. - This work was supported by the government contract of the Ministry of Education and Science of the Russian Federation to Siberian Federal University (Grant No. 16.1455.2017/PCh). N. S. M. acknowledges the financial support of the RFBR, through the research project No. 16- 32-60003 mol-a-dk. M. A. V. acknowledges the financial support of the RFBR, through the research project No. 16-32- 00252 mol-a. Z. I. P. gratefully acknowledges the financial support of the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST MISiS (No. K2-2017-001) and the support of the RFBR through the research project No. 17-42- 190308 r-a. . - ISSN 1932-7447
Аннотация: Two-layer freestanding heterostructure consisting of VS2 monolayer and graphene was investigated by means of density functional theory computations as a promising anode material for lithium-ion batteries (LIB). We have investigated lithium atoms’ sorption and diffusion on the surface and in the interface layer of VS2/graphene heterostructure with both H and T configurations of VS2 monolayer. The theoretically predicted capacity of VS2/graphene heterostructures is high (569 mAh/g), and the diffusion barriers are considerably lower for the heterostructures than for bulk VS2, so that they are comparable to barriers in graphitic LIB anodes (∼0.2 eV). Our results suggest that VS2/graphene heterostructures can be used as a promising anode material for lithium-ion batteries with high power density and fast charge/discharge rates.

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Держатели документа:
Siberian Federal University, 79 Svobodny av., Krasnoyarsk, Russian Federation
National University of Science and Technology MISiS, 4 Leninskiy prospekt, Moscow, Russian Federation
Kirensky Institute of Physics, 50/38 Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Mikhaleva, N. S.; Visotin, M. A.; Высотин Максим Александрович; Kuzubov, A. A.; Popov, Z. I.; Попов, Захар Иванович
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10.

New method for calculations of nanostructure kinetic stability at high temperature / A. S. Fedorov [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P. 167-170, DOI 10.1016/j.jmmm.2016.12.131. - Cited References:8. - The work was supported by the Russian Foundation for Basic Research Grant N15-02-06869A and by President of Russia Scientific School Program NSh 7559.2016.2. The authors would like to thank Joint Supercomputer Center of RAS, Moscow, for the access to the MVS 100K cluster and Institute of Computational Modelling of SB RAS, Krasnoyarsk, for providing the computational resources. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
AUGMENTED-WAVE METHOD
Кл.слова (ненормированные):
Kinetic stability -- Nanostructures -- Graphene nanoribbons
Аннотация: A new universal method is developed for determination of nanostructure kinetic stability (KS) at high temperatures, when nanostructures can be destroyed by chemical bonds breaking due to atom thermal vibrations. The method is based on calculation of probability for any bond in the structure to stretch more than a limit value L-max, when the bond breaks. Assuming the number of vibrations is very large and all of them are independent, using the central limit theorem, an expression for the probability of a given bond elongation up to L-max is derived in order to determine the KS. It is shown that this expression leads to the effective Arrhenius formula, but unlike the standard transition state theory it allows one to find the contributions of different vibrations to a chemical bond cleavage. To determine the KS, only calculation of frequencies and eigenvectors of vibrational modes in the groundstate of the nanostructure is needed, while the transition states need not be found. The suggested method was tested on calculating KS of bonds in some alkanes, octene isomers and narrow graphene nanoribbons of different types and widths at the temperature T=1200 K. The probability of breaking of the C-C bond in the center of these hydrocarbons is found to be significantly higher than at the ends of the molecules. It is also shown that the KS of the octene isomers decreases when the double C=C bond is moved to the end of the molecule, which agrees well with the experimental data. The KS of the narrowest graphene nanoribbons of different types varies by 1-2 orders of magnitude depending on the width and structure, while all of them are by several orders of magnitude less stable at high temperature than the hydrocarbons and benzene.

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Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Kuzubov, A. A.; Visotin, M. A.; Tomilin, F. N.; Томилин, Феликс Николаевич; Russian Foundation for Basic Research [N15-02-06869A]; President of Russia Scientific School Program [NSh 7559.2016.2]; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
}
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11.

Theoretical investigation of the interfaces and mechanisms of induced spin polarization of 1D narrow zigzag graphene- and h-BN nanoribbons on a SrO-terminated LSMO(001) surface / P. Avramov [et al.] // J. Phys. Chem. A. - 2017. - Vol. 121, Is. 3. - P. 680-689, DOI 10.1021/acs.jpca.6b09696. - Cited References:74. - We acknowledge the Siberian Supercomputer Center (SSCC) of SB RAS, Novosibirsk; the Joint Supercomputer Center of RAS, Moscow; and the ICC of Novosibirsk State University for providing the computing resources. P.B.S. acknowledges the financial support of the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST MISiS (No. K2-2015-033). The Russian Science Foundation (Grant No 14-13-00139) supported the work of the Russian team. The Japanese Science Foundation (JSPS KAKENHI, Grant No 16H3875) supported the work of the Japanese team. . - ISSN 1089-5639

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
HEXAGONAL BORON-NITRIDE
AUGMENTED-WAVE METHOD
GIANT MAGNETORESISTANCE
Аннотация: The structure of the interfaces and the mechanisms of induced spin polarization of 1D infinite and finite narrow graphene- and h-BN zigzag nanoribbons placed on a SrO-terminated La1-xSrxMnO3 (LSMO) (001) surface were studied using density functional theory (DFT) electronic structure calculations. It was found that the pi-conjugated nanofragments are bonded to the LSMO(001) surface by weak disperse interactions. The types of coordination of the fragments, the strength of bonding, and the rate of spin polarization depend upon the nature of the fragments. Infinite and finite graphene narrow zigzag nanoribbons are characterized by the lift of the spin degeneracy and strong spin polarization caused by interface-induced structural asymmetry and oxygen-mediated indirect exchange interactions with Mn ions of LSMO support. Spin polarization changes the semiconducting nature of infinite graphene nanoribbons to half-metallic state with visible spin-up density of states at the Fermi level. The h-BN nanoribbon binding energy is weaker than graphene nanoribbon ones with noticeably shorter interlayer distance. The asymmetry effect and indirect exchange interactions cause spin polarization of h-BN nanoribbon as well with formation of embedded states inside the band gap. The results show a possibility to use one-atom thick nanofragments to design LSMO-based heterostructures for spintronic nanodevices with h-BN as an inert spacer to develop different potential barriers.

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Держатели документа:
Kyungpook Natl Univ, Dept Chem, 80 Daehak Ro, Daegu 41566, South Korea.
Kyungpook Natl Univ, Green Nano Mat Res Ctr, 80 Daehak Ro, Daegu 41566, South Korea.
Siberian Fed Univ, 79 Svobodniy Pr, Krasnoyarsk 660041, Russia.
LV Kirensky Inst Phys SB RAS, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Natl Inst Quantum & Radiol Sci & Technol QST, Naka, Ibaraki 3191106, Japan.
Natl Univ Sci & Technol MISiS, Moscow 119049, Russia.

Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Kuzubov, A. A.; Кузубов, Александр Александрович; Kuklin, A. V.; Куклин, Артем Валентинович; Lee, H.; Kovaleva, E. A.; Ковалева, Евгения Андреевна; Sakai, S.; Entani, S.; Naramoto, H.; Sorokin, P. B.; Ministry of Education and Science of the Russian Federation [K2-2015-033]; Russian Science Foundation [14-13-00139]; Japanese Science Foundation (JSPS KAKENHI) [16H3875]
}
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12.

Heat-induced transformations in coronene - Single-walled carbon nanotube systems / A. I. Chernov [et al.] ; International Workshop on Nanocarbon Photonics and Optoelectronics) // J. Nanophoton. - 2016. - Vol. 10, Is. 1 : Special Section on Nanocarbon Photonics and Optoelectronics. - Ст. 012504, DOI 10.1117/1.JNP.10.012504. - Cited References: 14 . - ISSN 1934-2608

РУБ Nanoscience & Nanotechnology + Optics
Рубрики:
Graphene nanoribbons
Encapsulation
Reactor
Кл.слова (ненормированные):
graphene nanoribbons -- coronene molecules -- coronene stacks -- columns -- single-walled carbon nanotubes -- nanoreactor
Аннотация: Coronene molecules are used as filler for single-walled carbon nanotubes. Variation of the synthesis temperature regimes leads to formation of different types of carbon nanostructures inside the nanotubes. Accurate determination of the structures by optical spectroscopy methods remains an important issue in composite materials. Clear distinction between adsorbed organic molecules on the surface of the tubes and filled structures may be accessed by Raman and photoluminescence spectroscopies. We perform additional heat treatment after the initial synthesis procedure and show the evolution of the optical spectral features corresponding to the filled structures and adsorbed materials on the surface of single-walled carbon nanotubes. © 2015 Society of Photo-Optical Instrumentation Engineers (SPIE).

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Доп.точки доступа:
Chernov, A. I.; Fedotov, P. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Obraztsova, E. D.; International Workshop on Nanocarbon Photonics and Optoelectronics (4th ; 28 July - 1 August, 2014 ; Polvijärvi, North Karelia, Finland)
}
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13.

Study of interaction between transition metal atoms and bigraphene monovacancy by means of quantum chemistry / A. A. Kuzubov [et al.] // Comput. Mater. Sci. - 2016. - Vol. 112, Part A. - P. 269-275, DOI 10.1016/j.commatsci.2015.11.002. - Cited References: 39. - The authors would like to thank Siberian Supercomputer Center (SSCC) of SB RAS, Novosibirsk; and L.V. Kirensky Institute of Physics of SB RAS, Krasnoyarsk, for providing the access to their supercomputers. This work was supported by the government contract of the Ministry of Education and Science of the Russian Federation to Siberian Federal University (Grant No. 16.1500.2014/K). . - ISSN 0927-0256

РУБ Materials Science, Multidisciplinary
Рубрики:
INITIO MOLECULAR-DYNAMICS
   MASSLESS DIRAC FERMIONS
   GRAPHENE
   VACANCIES
   POINTS
   GAS
Кл.слова (ненормированные):
Bigraphene -- Spintronics -- Transition metal -- Adsorption -- Migration
Аннотация: First-row transition metal atoms adsorption on bigraphene monovacancy was studied within the framework of DFT in periodic boundary conditions. Electronic and magnetic properties of composites were analyzed and their potential utilization in spintronics was discussed. Barriers of metal atoms migration from bigraphene surface to the interlayer space through the vacancy were estimated in order to consider both thermodynamic and kinetic aspects of composites experimental preparation. Formation of metal atoms inner-sorbed on bigraphene was found to demand harsh synthesis conditions; whereas outer-sorbed composites demonstrate significantly higher degree of spin polarization which makes them perspective for usage in spintronic devices. © 2015 Elsevier B.V.

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
L.V. Kirensky Institute of Physics, 50 Akademgorodok, Krasnoyarsk, Russian Federation
Kyungpook National University, 80 Daehakro, Bukgu, Daegu, South Korea

Доп.точки доступа:
Kuzubov, A. A.; Кузубов, Александр Александрович; Avramov, P. V.; Аврамов, Павел Вениаминович; Nikolaeva, K. M.; Mikhaleva, N. S.; Kovaleva, E. A.; Kuklin, A. V.; Куклин, Артем Валентинович; Fedorov, A. S.; Федоров, Александр Семенович
}
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14.

High performance hybrid rGO/ Ag quasi-periodic mesh transparent electrodes for flexible electrochromic devices / A. S. Voronin [et al.] // Appl. Surf. Sci. - 2016. - Vol. 364. - P. 931–937, DOI 10.1016/j.apsusc.2015.12.182. - Cited References: 31 . - ISSN 0169-4332. - ISSN 1873-5584

РУБ Chemistry, Physical + Materials Science, Coatings & Films + Physics, Applied + Physics, Condensed Matter
Рубрики:
NANOWIRE NETWORKS
   GRAPHENE FILMS
   OXIDE
   OXIDATION
   HEATERS
Кл.слова (ненормированные):
Quasi-periodic mesh transparent electrode self-organized template -- Reduced graphene oxide (rGO) -- Flexible electrochromic device
Аннотация: A possibility of creating a stable hybrid coating based on the hybrid of a reduced graphene oxide (rGO)/ Ag quasi-periodic mesh (q-mesh) coating has been demonstrated. The main advantages of the suggested method are the low cost of the processes and the technology scalability. The Ag q-mesh coating is formed by means of the magnetron sputtering of silver on the original template obtained as a result of quasi-periodic cracking of a silica film. The protective rGO film is formed by low temperature reduction of a graphene oxide (GO) film, applied by the spray-deposition in the solution of NaBH4. The coatings have low sheet resistance (12.3 Ω/sq) and high optical transparency (82.2%). The hybrid coating are characterized by high chemical stability, as well as they show high stability to deformation impacts. High performance of the hybrid coatings as electrodes in the sandwich-system «electrode – electrochromic composition – electrode» has been demonstrated. The hybrid electrodes allow the electrochromic sandwich to function without any visible degradation for a long time, while an unprotected mesh electrode does not allow performing even a single switching cycle.

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Доп.точки доступа:
Voronin, A. S.; Ivanchenko, F. S.; Simunin, M. M.; Shiverskiy, A. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Nemtsev, I. V.; Fadeev, Y. V.; Karpova, D. V.; Khartov, S. V.
}
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15.

Spin polarization of zgnr4/lsmo(001) heterostructures: mno-terminated spinterface / A. V. Kuklin [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P10.28. - P. 496. - References: 3 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
LSMO -- zigzag graphene nanoribbons -- DFT -- spin polarization -- ZGNR

Доп.точки доступа:
Kuklin, A. V.; Куклин, Артем Валентинович; Kuzubov, A. A.; Кузубов, Александр Александрович; Fedorov, A. S.; Федоров, Александр Семенович; Avramov, P. V.; Аврамов, Павел Вениаминович; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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16.

Kagan, M. Y.
High-Tc and Low-Tc superconductivity in electron systems with repulsion / M. Y. Kagan, V. A. Mitskan, M. M. Korovushkin // J. Supercond. Nov. Magn. - 2016. - Vol. 29, Is. 4. - P. 1043-1048, DOI 10.1007/s10948-016-3384-7. - Cited References:31. - The authors are grateful to V. V. Val'kov, I. S. Burmistrov, M. V. Feigel'man, and A. Ya. Tzalenchuk for valuable remarks. This work is supported by the Russian Foundation for Basic Research (nos. 14-02-00058 and 14-02-31237). One of the authors (M. Yu. K.) gratefully acknowledges support from the Basic Research Program of the National Research University Higher School of Economics. Another one (M. M. K.) thanks the scholarship SP-1361.2015.1 of the President of Russia and the Dynasty foundation. . - ISSN 1557-1939. - ISSN 1557-1947

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
Fermion systems
   Doped graphene
   Hubbard-model
   Phase-diagram
   Superfluidity
   Density
Кл.слова (ненормированные):
Unconventional superconductivity -- Kohn-Luttinger mechanism -- Graphene
Аннотация: We demonstrate the instability of the normal state of purely repulsive fermionic systems towards the transition to the Kohn-Luttinger superconducting state. We construct the superconducting phase diagrams of these systems in the framework of the Hubbard and Shubin-Vonsovsky models on the square and hexagonal lattices. We show that an account for the long-range Coulomb interactions, as well as the Kohn- Luttinger renormalizations, lead to an increase in the critical superconducting temperatures in various materials, such as high-temperature superconductors, idealized monolayer, and bilayer of doped graphene. Additionally, we discuss the role of the structural disorder and the nonmagnetic impurities in superconducting properties of real graphene systems.

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Держатели документа:
PL Kapitsa Phys Problems Inst, Moscow 119334, Russia.
Natl Res Univ, Higher Sch Econ, Moscow 109028, Russia.
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
KTH Royal Inst Technol, NORDITA, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden.
Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden.

Доп.точки доступа:
Mitskan, V. A.; Мицкан, Виталий Александрович; Korovushkin, M. M.; Коровушкин, Максим Михайлович; Russian Foundation for Basic Research [14-02-00058, 14-02-31237]; Basic Research Program of the National Research University Higher School of Economics; Dynasty foundation; [SP-1361.2015.1]
}
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17.

    Pudlak, M.
    Cooperative phenomenon in a rippled graphene: Chiral spin guide / M. Pudlak, K. N. Pichugin, R. G. Nazmitdinov // Phys. Rev. B. - 2015. - Vol. 92, Is. 20. - Ст. 205432, DOI 10.1103/PhysRevB.92.205432. - Cited References:24. - M.P. and K.N.P. are grateful for the warm hospitality and creative atmosphere at UIB and JINR. This work was supported in part by Russian Foundation for Basic Research Grant No. 14-02-00723 and Vedecka Grantova Agentura MSVVaS SR a SAV (2/0037/13). . - ISSN 1098-0121. - ISSN 1550-235X
   Перевод заглавия: Кооперативное явление в волнообразном графене: киральный спиновый волновод

РУБ Physics, Condensed Matter
Рубрики:
CARBON NANOTUBES
Аннотация: We analyze spin scattering in ballistic transport of electrons through a ripple at a normal incidence of an electron flow. The model of a ripple consists of a curved graphene surface in the form of an arc of a circle connected from the left-hand and right-hand sides to two flat graphene sheets. At certain conditions the curvature-induced spin-orbit coupling creates a transparent window for incoming electrons with one spin polarization simultaneously with a backscattering of those with opposite polarization. This window is equally likely transparent for electrons with spin up and spin down that move in opposite directions. The spin-filtering effect that is small in one ripple becomes prominent with the increase of N consequently connected ripples that create a graphene sheet of the sinusoidal type. We present the analytical expressions for spin-up and spin-down transmission probabilities as a function of N connected ripples.

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Держатели документа:
Inst Expt Phys, Kosice 04001, Slovakia.
Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Univ Illes Balears, Dept Fis, E-07122 Palma De Mallorca, Spain.
Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia.

Доп.точки доступа:
Pichugin, K. N.; Пичугин, Константин Николаевич; Nazmitdinov, R. G.; Russian Foundation for Basic Research [14-02-00723]; Vedecka Grantova Agentura MSVVaS SR a SAV [2/0037/13]
}
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18.

    Kagan, M. Yu.
    Effect of the long-range Coulomb interaction on the phase diagram of the Kohn–Luttinger superconducting state in Idealized graphene / M. Yu. Kagan, V. A. Mitskan, M. M. Korovushkin // J. Low Temp. Phys. - 2015. - Vol. - P. 1-7, DOI 10.1007/s10909-015-1427-2 . - ISSN 0022. - ISSN 1573-7357
   Перевод заглавия: Влияние межузельного кулоновского взаимодействия на фазовую диаграмму сверхпроводящего состояния Кона-Латтинжера в идеализированном графене
Кл.слова (ненормированные):
Unconventional superconductivity -- Kohn-Luttinger mechanism -- Graphene monolayer
Аннотация: The effect of the long-range Coulomb interaction on the formation of the Kohn–Luttinger superconductivity in monolayer doped graphene is studied disregarding the Van der Waals potential of the substrate and both magnetic and non-magnetic impurities. It is shown that the allowance for the Kohn–Luttinger renormalizations up to the second order in perturbation theory in the on-site Hubbard interaction inclusively, as well as in the intersite Coulomb interaction, significantly affects the interplay between the superconducting phases with the f-wave, p+ip-wave, and d+id-wave symmetries of the order parameter. It is demonstrated that taking Coulomb repulsion of electrons located at the next-nearest neighboring atoms in such a system into account changes qualitatively the phase diagram and enhances the critical temperature of the transition to the superconducting phase.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia.
MF Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
P. L. Kapitza Institute for Physical Problems, Russian Academy of Sciences, Moscow,

Доп.точки доступа:
Mitskan, V. A.; Мицкан, Виталий Александрович; Korovushkin, M. M.; Коровушкин, Максим Михайлович
}
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19.

    Kagan, M. Y.
    Phase diagram of the Kohn-Luttinger superconducting state for bilayer graphene / M. Y. Kagan, V. A. Mitskan, M. M. Korovushkin // Eur. Phys. J. B. - 2015. - Vol. 88, Is. 6. - Ст. 157, DOI 10.1140/epjb/e2015-60198-x. - Cited References:60. - The authors are grateful to V.V. Val'kov for valuable remarks. This work is supported by the Russian Foundation for Basic Research (Projects Nos. 14-02-00058 and 14-02-31237). One of the authors (M.Yu.K.) gratefully acknowledges support from the Basic Research Program of the National Research University Higher School of Economics. Another one (M.M.K.) thanks the scholarship SP-1361.2015.1 of the President of the Russian Federation and the Dynasty foundation. . - ISSN 1434. - ISSN 1434-6036
   Перевод заглавия: Фазовая диаграмма сверхпроводящего состояния Кона-Латтинжера для бислоя графена

РУБ Physics, Condensed Matter
Рубрики:
REPULSIVE INTERACTIONS
   DOPED GRAPHENE
   HUBBARD-MODEL
   FERMI-SURFACE
Аннотация: The effect of Coulomb interaction between Dirac fermions on the formation of the Kohn-Luttinger superconducting state in bilayer doped graphene is studied disregarding of the effect of the van der Waals potential of the substrate and impurities. The phase diagram determining the boundaries of superconductive domains with different types of symmetry of the order parameter is built using the extended Hubbard model in the Born weak-coupling approximation with allowance for the intratomic, interatomic, and interlayer Coulomb interactions between electrons. It is shown that the Kohn-Luttinger polarization contributions up to the second order of perturbation theory in the Coulomb interaction inclusively and an account for the long-range intraplane Coulomb interactions significantly affect the competition between the superconducting phases with the f-, p + ip-, and d + id-wave symmetries of the order parameter. It is demonstrated that the account for the interlayer Coulomb interaction enhances the critical temperature of the transition to the superconducting phase.

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Держатели документа:
Russian Acad Sci, PL Kapitza Inst Phys Problems, Moscow 119334, Russia.
Natl Res Univ, Higher Sch Econ, Moscow 109028, Russia.
Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
MF Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Mitskan, V. A.; Мицкан, Виталий Александрович; Korovushkin, M. M.; Коровушкин, Максим Михайлович; Каган, Максим Юрьевич
}
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20.

Prediction and theoretical investigation of new 2D and 3D periodical structures, having graphene-like bandstructures / A. S. Fedorov [et al.] // Phys. Status Solidi B. - 2015. - Vol. 252, Is. 11. - P. 2407-2411, DOI 10.1002/pssb.201552226. - Cited References: 27. - This work was supported by the Ministry of Education and Science of Russia (Russian-Japanese joined project, Agreement No. 14.613.21.0010, ID RFMEFI61314 x 0010). The authors are grateful to the Joint Supercomputer Center of Russian Academy of Sciences, Moscow and Siberian Supercomputer Center (SSCC) of SB RAS, Novosibirsk for the opportunity of using their computer clusters to perform the calculations . - ISSN 0370-1972

РУБ Physics, Condensed Matter
Рубрики:
BRILLOUIN-ZONE INTEGRATIONS
   INITIO MOLECULAR-DYNAMICS
   AUGMENTED-WAVE METHOD
   DIRAC FERMIONS
   ELECTRON-GAS
   TRANSITION
   POINTS
Кл.слова (ненормированные):
DFT calculations -- Dirac cones -- Graphene -- Nanoparticles
Аннотация: A new family of planar nanostructures having graphene-like electronic band structure is theoretically investigated by density functional theory (DFT). Based on general perturbation theory and a tight-binding model, it was shown that graphene-like planar structures, consisting of identical nanoparticles with relatively weak contacts between them, should have an electronic band structure with Dirac cones. Two such structures, consisting of 71- or 114-silicon atom nanoparticles, were investigated by DFT using VASP software package. The band-structure calculations show the presence of Dirac cones with electron group velocity equal to 1.05 × 105 and 0.53 × 105 m/s, respectively. By generalizing the theory, a new family of 3D structures having intersecting areas with linear dispersion in the band structures was derived. As an example, the band structure of identical 25-atom silicon nanoclusters arranged in a simple cubic lattice was calculated. It was shown that the band structure has features similar to the Dirac cones.

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Держатели документа:
Kirensky Institute of Physics, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian Federal University, av. Svobodny 79, Krasnoyarsk, Russian Federation
National University of Science and Technology MISiS, av. Leninskiy 4, Moscow, Russian Federation

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Popov, Z. I.; Попов, Захар Иванович; Kuzubov, A. A.; Кузубов, Александр Александрович; Visotin, M. A.
}
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