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1.
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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2.
Ab initio LC-DFT
study of
graphene
, multilayer graphenes and graphite / P. V. Avramov [et al.]> // Chem. Phys. Lett. - 2011. -
Vol. 508
,
Is. 1-3
. - P. 86-89,
DOI
10.1016/j.cplett.2011.04.016. - Cited References: 32. - This work was supported by JAEA Research fellowship (P.V.A.). P.V.A. also acknowledges JAEA ASRC and Molecular Spintronics Group for hospitality and fruitful collaboration. . - ISSN 0009-2614
РУБ
Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
DENSITY
NANORIBBONS
PERFORMANCE
FUNCTIONALS
FULLERENE
COBALT
FILMS
Аннотация:
Atomic structure of
graphene
, bi-, tri-, tetralayer graphenes and graphite as well was studied using ab initio HSE, LDA and PBE DFT approaches in periodic boundary conditions. Based on comparison of theoretical results with experimental data the performance of the methods was estimated. It was found that long-range corrected HSE potential is the most reliable DFT approximation to reproduce the atomic structure of weakly bound multilayer graphenes and graphite as well. (C) 2011 Elsevier B. V. All rights reserved.
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Держатели документа:
[Avramov, Pavel V.
Sakai, Seiji
Entani, Shiro
Matsumoto, Yoshihiro
Naramoto, Hiroshi] Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan
[Avramov, Pavel V.] LV Kirenskii Inst Phys, SB RAS, Krasnoyarsk 660036, Russia
[Avramov, Pavel V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Sakai, S.; Entani, S.; Matsumoto, Y.; Naramoto, Hiroshi
}
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3.
Kagan, M. Y.
Anomalous superconductivity and superfluidity in repulsive fermion systems / M. Y. Kagan, V. A. Mitskan, M. M. Korovushkin> // Phys. Usp. - 2015. -
Vol. 58
,
Is. 8
. - P. 733-761,
DOI
10.3367/UFNe.0185.201508a.0785. - Cited References: 369. - We are grateful to M A Baranov, A V Chubukov, D V Efremov, M V Feigel'man, V V Kabanov, K I Kugel', M S Marienko, N M Plakida, N V Prokorev, A Ya Tzalenchuk, and V V Val'kov for the fruitful discussions and constant attention to our work. The work was supported by the Russian Foundation for Basic Research (project nos. 14-02-00058 and 14-02-31237). M Yu K thanks the Program of Basic Research of the National Research University Higher School of Economics for support. The work of MM K was supported by grant of the President of the Russian Federation (SP-1361.2015.1) and the Dinasty Foundation . - ISSN 1063-7869
РУБ
Physics, Multidisciplinary
Рубрики:
HEXAGONAL BORON-NITRIDE
SCANNING-TUNNELING-MICROSCOPY
2-DIMENSIONAL HUBBARD-MODEL
HIGH-TC SUPERCONDUCTIVITY
ELECTRON-ENERGY SPECTRUM
P-WAVE SUPERCONDUCTIVITY
DOUBLE-LAYER
GRAPHENE
2D KONDO-LATTICE
GROUND-STATE
TRANSITION-TEMPERATURE
Кл.слова (ненормированные):
anomalous superconductivity
--
Kohn-Luttinger mechanism
--
superfluidity
--
repulsive Fermi gas
--
Hubbard and t-Jmodel
--
Shubin Vonsovsky model
--
graphene
monolayer
--
graphene
bilayer
Аннотация:
We discuss the mechanisms of unconventional superconductivity and superfluidity in 3D and 2D fermionic systems with purely repulsive interaction at low densities. We construct phase diagrams of these systems and find the areas of the superconducting state in free space, as well as on the lattice in the framework of the Fermi-gas model with hard-core repulsion, the Hubbard model, the Shubin-Vonsovsky model, and the t-J model. We demonstrate that the critical superconducting temperature can be greatly increased in the spin-polarized case or in a two-band situation already at low densities. The proposed theory is based on the Kohn-Luttinger mechanism or its generalizations and explains or predicts anomalous p-, d-, and f-wave pairing in various materials, such as high-temperature superconductors, the idealized monolayer and bilayer of doped
graphene
, heavy-fermion systems, layered organic superconductors, superfluid 3He, spin-polarized 3He mixtures in 4He, ultracold quantum gases in magnetic traps, and optical lattices.
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Публикация на русском языке
Каган, Максим Юрьевич. Аномальная сверхпроводимость и сверхтекучесть в фермионных системах с отталкиванием [Текст] / М. Ю. Каган, В. А. Мицкан, М. М. Коровушкин // Успехи физ. наук : ред. журн. "Успехи физ. наук", 2015. - Т. 185 № 8. - С. 785-815
Держатели документа:
Kapitza Institute for Physical Problems, Russian Academy of Sciences, ul. Kosygina 2, Moscow, Russian Federation
National Research University, Higher School of Economics, ul. Myasnitskaya 20, Moscow, Russian Federation
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50, str. 38, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, prosp. Gazety Krasnoyarskii rabochii 31, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Mitskan, V. A.; Мицкан, Виталий Александрович; Korovushkin, M. M.; Коровушкин, Максим Михайлович
}
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4.
Atomic and Electronic
Structure of
Graphene
- and Multigraphene-based 2D Extended Complex Nanocomposites [Text] / P. Avramov, S. Sakai, S. Entani [et al.]> //
5th International Workshop on Spin Currents. - 2011. - P2-14
Доп.точки доступа:
Avramov, P.; Sakai, S.; Entani, S.; Matsumoto, Y.; Naramoto, H.; Ohtomo, M.; International Workshop on Spin Currents(5 ; 2011 ; July ; 25-28 ; Sendai)
}
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5.
Atomic structure and
physical properties of fused porphyrin nanoclusters / P. V. Avramov [et al.]> // J. Porphyr. Phthalocyanines. - 2014. -
Vol. 18
,
Is. 7
. - P. 552-568,
DOI
10.1142/S1088424614500291. - Cited References: 66. - This work was supported by JAEA Research fellowship (P. V. A.). P. V. A. also acknowledges JAEA ASRC and Molecular Spintronics Group for hospitality and fruitful collaboration. This work was supported by the Russian Scientific Foundation, Project No. 14-13-00139. Authors are grateful for Prof. S. G. Ovchinnikov for fruitful discussions. . - ISSN 1088-4246. - ISSN 1099-1409
РУБ
Chemistry, Multidisciplinary
Рубрики:
AUGMENTED-WAVE METHOD
HOLONOMIC QUANTUM COMPUTATION
INITIO MOLECULAR-DYNAMICS
VAPOR ABSORPTION SPECTRA
BORON-NITRIDE NANOTUBES
ELECTRONIC-STRUCTURE
REDOX REACTIONS
EXCITED-STATES
SPIN-STATES
GRAPHENE
Кл.слова (ненормированные):
nanoclusters
--
fused porphyrins
--
electronic structure
--
mechanical properties
Аннотация:
The atomic and electronic structures, mechanical properties and potential barriers of formation of a set of meso–meso β–β fused porphyrin/metalloporphyrin nanopages, nanotapes, nanotubes and 2D nanofabrics were studied by GGA LC-DFT technique using cluster and PBC models. The porphyrin pages of the nanoclusters are connected with each other by
graphene
fragments formed by meso–meso β–β links. Fusion of all the edges of six porphyrin/metalloporphyrin units produces a novel ~ 1 nm sized molecule of cubic symmetry with a hollow cage inside. It was found that all studied nanoclusters are metastable with formation energies 0.36–7.57 kcal/mol per atom. Under applied mechanical stress, the nanoclusters exhibit superelastic and ultrastrong properties with binding
graphene
fragments being the weakest links for mechanical rupture. Depending on the spin-dependent reaction pathways, the hollow caged nanoclusters exhibit almost zero or low potential energy barriers (1–10 kcal/mol) during the initial stages of self-assembly. All nanoclusters exibit the main features of the electronic structures of the parent porphyrins, in particular the nature of HOMO/LUMO states and the relative energetic positions of the metal d states. The induced curvature of the hollow cage nanoclusters leads to admixture of more than 2% of the dπ⊥ states to the dσ energy region and formation of vacant superatomic molecular orbitals of d character in cubic ligand field. The Fe-derived hollow-caged nanoclusters reveal extremely high spin states with small energy differences between ferromagnetic and antiferromagnetic configurations, which can be utilized for quantum holonomic computations.
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Держатели документа:
Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Tomsk State Univ, Tomsk 634050, Russia
Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Kuzubov, A. A.; Кузубов, Александр Александрович; Sakai, S.; Ohtomo, M.; Entani, S.; Matsumoto, Y.; Eleseeva, N. S.; Елисеева, Наталья Сергеевна; Pomogaev, V. A.; Naramoto, H.; JAEA Research fellowship; Russian Scientific Foundation [14-13-00139]
}
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6.
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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7.
Contact-induced spin polarization
in
graphene
/h-BN/Ni nanocomposites / P. V. Avramov [et al.]> // J. Appl. Phys. - 2012. -
Vol. 112
,
Is. 11
. - Ст. 114303. - P. ,
DOI
10.1063/1.4767134. - Cited References: 47. - This work was supported by JAEA Research fellowship (P.V.A.). P.V.A. also acknowledges JAEA ASRC and Molecular Spintronics Group for hospitality and fruitful collaboration. The authors are grateful to the ICS SB RAS and SFU CC (Krasnoyarsk), ISC RAS and MSU CRC, (SKIF MSU "Chebyshev", Moscow) for computer resources. This work was partially supported by the RFBR grant 12-02-31417. . - ISSN 0021-8979
РУБ
Physics, Applied + Boron nitride + Electronic structure + Nanocomposites + Plates (structural components) + Spin polarization +
Graphene
Рубрики:
HEXAGONAL BORON-NITRIDE
TRILAYER
GRAPHENE
NI(111) SURFACE
GRAPHITE
APPROXIMATION
SPINTRONICS
DIFFRACTION
SIMULATION
SUBSTRATE
CARBON
Аннотация:
Atomic and electronic structure of
graphene
/Ni(111), h-BN/Ni(111) and
graphene
/h-BN/Ni(111) nanocomposites with different numbers of
graphene
and h-BN layers and in different mutual arrangements of
graphene
/Ni and h-BN/Ni at the interfaces was studied using LDA/PBC/PW technique. Using the same technique corresponding
graphene
, h-BN and
graphene
/h-BN structures without the Ni plate were calculated for the sake of comparison. It was suggested that C-top:C-fcc and N-top:B-fcc configurations are energetically favorable for the
graphene
/Ni and h-BN/Ni interfaces, respectively. The Ni plate was found to induce a significant degree of spin polarization in
graphene
and h-BN through exchange interactions of the electronic states located on different fragments. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767134]
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Держатели документа:
[Avramov, Pavel V.
Sakai, Seiji
Ohtomo, Manabu
Entani, Shiro
Matsumoto, Yoshihiro
Naramoto, Hiroshi] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
[Avramov, Pavel V.
Kuzubov, A. A.
Eleseeva, Natalia S.] LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Kuzubov, A. A.; Sakai, Seiji; Ohtomo, Manabu; Entani, Shiro; Matsumoto, Yoshihiro; Naramoto, Hiroshi; Eleseeva, N. S.; Елисеева, Наталья Сергеевна
}
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8.
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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9.
DFT investigation of
the influence of ordered vacancies on elastic and magnetic properties of
graphene
and
graphene
-like SiC and BN structures / A. S. Fedorov [et al.]> // Phys. Status Solidi B. - 2012. -
Vol. 249
,
Is. 12
. - P. 2549-2552,
DOI
10.1002/pssb.201200105. - Cited References: 32. - The work was supported by The Ministry of education and science of Russia, project 14.B37.21.0163. The authors express their gratitude to the Joint Supercomputer Center, Russian Academy of Sciences, Moscow and the supercomputer center of the Moscow State University (SKIF-MGU) for the possibility of using their computer clusters to perform all calculations. . - ISSN 0370-1972
РУБ
Physics, Condensed Matter
Рубрики:
WALLED CARBON NANOTUBES
INITIO MOLECULAR-DYNAMICS
AB-INITIO
DEFECTS
STATE
MONOLAYER
POINTS
Кл.слова (ненормированные):
boron nitride
--
carbon silicide
--
elastic properties
--
graphene
--
magnetic properties
--
vacancies
Аннотация:
Influence of ordered monovacancies on elastic properties of
graphene
is theoretically investigated by density functional theory (DFT) calculations. Inverse linear dependence of the
graphene
Young's modulus on the concentration of vacancies has been revealed and migration rate of the vacancies has been calculated as a function of applied strain. It is shown that the migration rate can be controlled by applying various strains or temperatures. The influence of ordered monovacancies on magnetic properties of
graphene
as well as
graphene
-like hexagonal carbon silicide (2D-SiC) and the boron nitride (h-BN) structures is investigated. It is established that the presence of vacancies in all systems yields the appearance of local magnetic moment. However, in 2D-SiC structure the magnetic moment occurs only in the case of a Si vacancy. Influence of the distance between vacancies on the ferromagnetic or anti-ferromagnetic ordering for all structures is established. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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Держатели документа:
[Fedorov, A. S.
Popov, Z. I.
Fedorov, D. A.] RAS, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
[Eliseeva, N. S.
Serjantova, M. V.
Kuzubov, A. A.] Siberian Fed Univ, Krasnoyarsk 660028, Russia
Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Popov, Z. I.; Попов, Захар Иванович; Fedorov, D. A.; Федоров, Дмитрий Александрович; Eliseeva, N. S.; Serjantova, M. V.; Kuzubov, A. A.; Кузубов, Александр Александрович
}
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10.
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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11.
Chernozatonskii, L. A.
Electronic superlattices and waveguides based on
graphene
: structures, properties and applications / L. A. Chernozatonskii, P. B. Sorokin> // Phys. Status Solidi BVol. 245,
Is. 10
. - P. 2086-2089,
DOI
10.1002/pssb.200879578. - Cited References: 21. - We are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences for the possibility of using a cluster computer for quantum-chemical calculations, to I.V. Stankevich, L. Biro and J. Bruning for fruitful discussions. The geometry of all presented structures was visualized by ChemCraft software (http://www.chemcraftprog.com). This work was supported by the Russian Foundation for Basic Research (project no. 08-02-01096). . - ISSN 0370-1972
РУБ
Physics, Condensed Matter
Рубрики:
PSEUDOPOTENTIALS
GAS
Аннотация:
The new class of quasi-2D superlattices based on
graphene
with periodically adsorbed hydrogen pairs was proposed. The ab initio DFT method was used for optimization of the atomic geometry and electronic structure of propose structures. It was found that the superlattices band gap decreases nonmonotonically with distance between hydrogen pairs. Based on these results we hope that the
graphene
superlattices can be promising candidates for various nanotechnological applications especially as elements in nanoelectronic devices. (C) 2008 WILEY-VCH Verlag GmBH & Co. KGaA, Weinheim
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Держатели документа:
[Chernozatonskii, Leonid A.
Sorokin, Pavel B.] Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia
[Sorokin, Pavel B.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Sorokin, Pavel B.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosigina st., Moscow 119334, Russian Federation
Siberian Federal University, 79 Svobodny av., Krasnoyarsk 660041, Russian Federation
Kirensky Institute of Physics, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Sorokin, P. B.; Сорокин, Павел Б.
}
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12.
Graphene
biribbons: the
features of electronic properties [Text] / L. A. Chernozatonskii, P. B. Sorokin> //
9th Biennial International Workshop "Fullerenes and Atomic Clusters" (IWFAC 2009) : July 6-10, 2009, St Petersburg, Russia : abstracts. - 2009. - Ст. P2.3. - P74
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Доп.точки доступа:
Chernozatonskii, L.A.; Sorokin, P.B.; "Fullerenes and Atomic Clusters", Biennial International Workshop(9 ; 2009 ; JUL)
}
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13.
Growth of
graphene
on magnetic metal thin films by ultrahigh vacuum chemical vapor deposition [Text] / S. Entani, Y. Matsumoto, M. Ohtomo [et al.]> //
5th International Workshop on Spin Currents. - 2011. - P1-37
Доп.точки доступа:
Entani, S.; Matsumoto, Y.; Ohtomo, M.; Avramov, P.V.; Naramoto, H.; Seiji, Sakai; International Workshop on Spin Currents(5 ; 2011 ; July ; 25-28 ; Sendai)
}
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14.
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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15.
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.
}
Найти похожие
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.
Influence of Size
Effect on the Electronic and Elastic Properties of Diamond Films with Nanometer Thickness / L. A. Chernozatonskii [et al.]> // J. Phys. Chem. C. - 2011. -
Vol. 115
,
Is. 1
. - P. 132-136,
DOI
10.1021/jp1080687. - Cited Reference Count: 37. - Гранты: L.A.C. was supported by the Russian Academy of Sciences, program No. 21 and by the Russian Foundation for Basic Research (project no. 08-02-01096). P.B.S. and B.I.Y. acknowledge support by the Office of Naval Research (MURI project). P.V.A. and P.B.S. also acknowledge the collaborative RFBR-JSPS grant no. 09-02-92107-R Phi. We are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences for the possibility of using a cluster computer for quantum chemical calculations. The geometry of all presented structures was visualized by commercial Chem-Craft software. - Финансирующая организация: Russian Academy of Sciences [21]; Russian Foundation for Basic Research [08-02-01096]; Office of Naval Research (MURI); RFBR-JSPS [09-02-92107-RPhi] . - JAN 13. - ISSN 1932-7447
Рубрики:
REVERSIBLE HYDROGENATION
GRAPHENE
GRAPHANE
Atomic structure
Band gaps
Diamond nanocrystals
Elastic properties
Electronic band structure calculation
Energy stability
Experimental data
Hydrogen atoms
Nanometer thickness
Size effects
Theoretical result
Diamond films
Elasticity
Carbon films
Кл.слова (ненормированные):
Atomic structure
--
Band gaps
--
Diamond nanocrystals
--
Elastic properties
--
Electronic band structure calculation
--
Energy stability
--
Experimental data
--
Hydrogen atoms
--
Nanometer thickness
--
Size effects
--
Theoretical result
--
Diamond films
--
Elasticity
--
Carbon films
Аннотация:
The atomic structure and physical properties of few-layered <111> oriented diamond nanocrystals (diamanes), covered by hydrogen atoms from both sides, are studied using electronic band structure calculations. It was shown that energy stability linearly increases upon increasing of the thickness of proposed structures. All 2D carbon films display direct dielectric band gaps with nonlinear quantum confinement response upon the thickness. Elastic properties of diamanes reveal complex dependence upon increasing of the number of <111> layers. All theoretical results were compared with available experimental data.
The atomic structure and physical properties of few-layered 〈111〉 oriented diamond nanocrystals (diamanes), covered by hydrogen atoms from both sides, are studied using electronic band structure calculations. It was shown that energy stability linearly increases upon increasing of the thickness of proposed structures. All 2D carbon films display direct dielectric band gaps with nonlinear quantum confinement response upon the thickness. Elastic properties of diamanes reveal complex dependence upon increasing of the number of 〈111〉 layers. All theoretical results were compared with available experimental data. © 2010 American Chemical Society.
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Scopus. Final
Держатели документа:
Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77251 USA
Rice Univ, Dept Chem, Houston, TX 77251 USA
Technol Inst Superhard & Novel Carbon Mat, Troitsk 142190, Moscow Region, Russia
Russian Acad Sci, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
Доп.точки доступа:
Chernozatonskii, L.A.; Sorokin, P.B.; Kuzubov, A.A.; Kvashnin, A.G.; Kvashnin, D.G.; Avramov, P.V.; Yakobson, B.I.; Sorokin, B.P.
}
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18.
Intrinsic edge asymmetry
in narrow zigzag hexagonal heteroatomic nanoribbons causes their subtle uniform curvature / P. V. Avramov [et al.]> // J. Phys. Chem. Lett. - 2012. -
Vol. 3
,
Is. 15
. - P. 2003-2008,
DOI
10.1021/jz300625t. - Cited References: 42. - This work was supported by JAEA Research fellowship (P.V.A.). P.V.A. also acknowledges JAEA ASRC and the Molecular Spintronics Group for hospitality and fruitful collaboration. D.G.F. thanks Prof. Kazuo Kitaura for many fruitful discussions and the Next Generation SuperComputing Project, Nanoscience Program and Strategic Programs for Innovative Research (MEXT, Japan) for financial support. This work was partially supported by Russian Ministry of Education and Science (Contract No. 16.552.11.7014) (P.B.S.). . - ISSN 1948-7185
РУБ
Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Atomic, Molecular & Chemical + Boron nitride + Density functional theory + Electronic structure + Fluorine +
Graphene
+ Orbital calculations + Quantum chemistry + Silicon carbide
Рубрики:
MOLECULAR-ORBITAL METHOD
WALLED CARBON NANOTUBES
GRAPHENE
NANORIBBONS
ELECTRONIC-STRUCTURE
OPTICAL-TRANSITIONS
SOLIDS
BOND
Aromatic rings
Conical surfaces
Finite length
Fragment molecular orbital methods
Graphene
nanoribbons
Intrinsic curvature
Nanoribbons
Out-of-plane
Structural stress
Кл.слова (ненормированные):
zigzag nanoribbons
--
hexagonal atomic lattices
--
fluorine-terminated
graphene
Аннотация:
The atomic and electronic structure of narrow zigzag nanoribbons with finite length, consisting of
graphene
terminated by fluorine on one side, hexagonal (h) h-BN, and h-SiC were studied with density functional theory. It is found that the asymmetry of nanoribbon edges causes a uniform curvature of the ribbons due to structural stress in the aromatic ring plane. Narrow
graphene
nanoribbons terminated with fluorine on one side demonstrate a considerable out-of-plane bend, suggesting that the nanoribbon is a fraction of a conical surface. It is shown that the intrinsic curvature of the narrow nanoribbons destroys the periodicity and results in a systematic cancellation of the dipole moment. The in- and out- of-plane curvature of thin arcs allows their closure in nanorings or cone fragments of giant diameter. Using the fragment molecular orbital method, we optimized the structure of a planar giant arc and a closed ring of h-BN with a diameter of 105 nm.
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Держатели документа:
[Avramov, Pavel V.
Sakai, Seiji
Entani, Shiro
Ohtomo, Manabu
Matsumoto, Yoshihiro
Naramoto, Hiroshi] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
[Avramov, Pavel V.] LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
[Fedorov, Dmitri G.] Natl Inst Adv Ind Sci & Technol, Nanosyst Res Inst, Tsukuba, Ibaraki 3058568, Japan
[Sorokin, Pavel B.] Technol Inst Superhard & Novel Carbon Mat, Troitsk 142190, Moscow Region, Russia
Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Fedorov, D. G.; Sorokin, P. B.; Sakai, S.; Entani, S.; Ohtomo, M.; Matsumoto, Y.; Naramoto, H.
}
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19.
Kagan, M. Y.
Kohn-Luttinger superconductivity in monolayer and bilayer semimetals with the Dirac spectrum / M. Y. Kagan, V. A. Mitskan, M. M. Korovushkin> // J. Exp. Theor. Phys. - 2014. -
Vol. 119
,
Is. 6
. - P. 1140-1149,
DOI
10.1134/S1063776114120048. - Cited References:70. - This work was performed under the Program of the RAS Division ofPhysical Sciences (project no. II.3.1) and was supported financially bythe Russian Foundation for Basic Research (project nos. 14-02-00058 and14-02-31237) and by the President of the Russian Federation (grant no.MK-526.2013.2). One of the authors (M.M.K.) thanks the "Dynasty"foundation for financial support. . - ISSN 1063. - ISSN 1090-6509. -
РУБ
Physics, Multidisciplinary
Рубрики:
FERMI-SURFACE
REPULSIVE INTERACTIONS
DOPED
GRAPHENE
HUBBARD-MODEL
Аннотация:
The effect of Coulomb interaction in an ensemble of Dirac fermions on the formation of superconducting pairing in monolayer and bilayer doped
graphene
is studied using the Kohn-Luttinger mechanism disregarding the Van der Waals potential of the substrate and impurities. The electronic structure of
graphene
is described using the Shubin-Vonsovsky model taking into account the intratomic, interatomic, and interlayer (in the case of bilayer
graphene
) Coulomb interactions between electrons. The Cooper instability is determined by solving the Bethe-Saltpeter integral equation. The renormalized scattering amplitude is obtained with allowance for the Kohn-Luttinger polarization contributions up to the second order of perturbation theory in the Coulomb interaction. It plays the role of effective interaction in the Bethe-Salpeter integral equation. It is shown that the allowance for the Kohn-Luttinger renormalizations as well as intersite Coulomb interaction noticeably affects the competition between the superconducting phases with the f-wave and d + id-wave symmetries of the order parameter. It is demonstrated that the superconducting transition temperature for an idealized
graphene
bilayer with significant interlayer Coulomb interaction between electrons is noticeably higher than in the monolayer case.
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Публикация на русском языке
Каган, Максим Юрьевич. Сверхпроводимость Кона-Латтинжера в многослойном и бислойном полуметалле с дираковским спектром [Текст] / М. Ю. Каган, В. А. Мицкан, М. М. Коровушкин // Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 146 Вып. 6. - С. 1301-1312
Держатели документа:
Russian Acad Sci, Kapitza Inst Phys Problems, Moscow 119334, Russia.
Natl Res Univ, Higher Sch Econ, Moscow 109028, Russia.
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
Доп.точки доступа:
Mitskan, V. A.; Мицкан, Виталий Александрович; Korovushkin, M. M.; Коровушкин, Максим Михайлович; RAS Division of Physical Sciences [II.3.1]; Russian Foundation for BasicResearch [14-02-00058, 14-02-31237]; Russian Federation [MK-526.2013.2]; "Dynasty" foundation
}
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20.
Magnetization of diamond-
graphene
flakes composites / I. A. Denisov, P. I. Belobrov [et al.]> //
Trends in NanoTechnology (TNT 2009). - 2009. - This research was supported by RFBR Grants 07-04-01340-а and 08-02-00259-a, ME&S of RF Grant No. 2.2.2.2/5309 and U.S. CRDF Grant RUX0-002-KR-06/BP4M02.
Материалы конференции
,
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Доп.точки доступа:
Denisov, I.A.; Belobrov, P. I.; Белобров, Петр Иванович; Tsegelnik, S.S.; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Znak, D.A.; Balaev, D. A.; Балаев, Дмитрий Александрович; Bayukov, O. A.; Баюков, Олег Артемьевич; Korchagina, S.B.; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Volkov, N. V.; Волков, Никита Валентинович; Gordeev, S.K.; Trends in NanoTechnology(2009 ; Sep. 7-11 ; Barcelona, Spain)
}
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