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1.
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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2.
Contact-induced spin polarization
in BNNT(CNT)/TM (TM=Co, Ni) nanocomposites / A. A. Kuzubov [et al.]> // J. Appl. Phys. - 2014. -
Vol. 116
,
Is. 8
. - Ст. 084309,
DOI
10.1063/1.4894157. - Cited References: 21. - This work was supported by the Russian Scientific Fund, Project No. 14-13-00139. The authors would like to thank Institute of Computational Modelling of SB RAS, Krasnoyarsk; Joint Supercomputer Center of RAS, Moscow; the HPC Research Department and Center of Equipment for Joint Use of Siberian Federal University, Krasnoyarsk; Siberian Supercomputer Center (SSCC) of SB RAS, Novosibirsk; and Laboratory of Parallel Information Technologies 21 of Research Computing Center of Moscow State University (the SKIF MSU "Chebyshev" system) for providing the access to their supercomputers. . - ISSN 0021-8979. - ISSN 1089-7550
РУБ
Physics, Applied
Рубрики:
TOTAL-ENERGY CALCULATIONS
HEXAGONAL BORON-NITRIDE
WAVE BASIS-SET
AB-INITIO
PSEUDOPOTENTIALS
DISPERSION
NANOTUBE
NI(111)
Аннотация:
The interaction between carbon and BN nanotubes (NT) and transition metal Co and Ni supports was studied using electronic structure calculations. Several configurations of interfaces were considered, and the most stable ones were used for electronic structure analysis. All NT/Co interfaces were found to be more energetically favorable than NT/Ni, and conductive carbon nanotubes demonstrate slightly stronger bonding than semiconducting ones. The presence of contact-induced spin polarization was established for all nanocomposites. It was found that the contact-induced polarization of BNNT leads to the appearance of local conductivity in the vicinity of the interface while the rest of the nanotube lattice remains to be insulating. (c) 2014 AIP Publishing LLC.
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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian State Technol Univ, Krasnoyarsk 660049, Russia
Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
Доп.точки доступа:
Kuzubov, A. A.; Кузубов, Александр Александрович; Kovaleva, E. A.; Ковалева, Евгения Андреевна; Avramov, P. V.; Аврамов, Павел Вениаминович; Kuklin, A. V.; Куклин, Артем Валентинович; Mikhaleva, N. S.; Михалева, Наталья Сергеевна; Tomilin, F. N.; Томилин, Феликс Николаевич; Sakai, S.; Entani, S.; Matsumoto, Y.; Naramoto, H.; Russian Scientific Fund [14-13-00139]
}
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3.
Magnesium Boride Nanotubes:
Relative Stability and Atomic and Electronic Structure / P. B. Sorokin [et al.]> // J. Phys. Chem. C. - 2010. -
Vol. 114
,
Is. 11
. - P. 4852-4856,
DOI
10.1021/jp9112014. - Cited Reference Count: 38. - Гранты: P.B.S. and B.I.Y. acknowledge support by the Basic Energy Sciences division of the Department of Energy, award DE-SC0001479. L.A.C. was supported by the Russian Academy of Sciences, program No. 21. P.V.A ad 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 ChemCraft software (http://www.chemcraftprog.com). - Финансирующая организация: Basic Energy Sciences division of the Department of Energy [DE-SC0001479]; Russian Academy of Sciences [21]; RFBR-JSPS [09-02-92107-RPhi] . - MAR 25. - ISSN 1932-7447
Рубрики:
BORON
PSEUDOPOTENTIALS
FULLERENES
SIMULATION
FORM
Кл.слова (ненормированные):
Basic composition
--
Bending behavior
--
Comparative studies
--
Diborides
--
Energy analysis
--
Energy minima
--
Magnesium atom
--
Magnesium boride
--
MgB2
--
Relative stabilities
--
Semiconducting behavior
--
Small-diameter
--
Staggered configuration
--
Sub-lattices
--
Bending (forming)
--
Borides
--
Boron
--
Electronic properties
--
Electronic structure
--
Energy management
--
Magnesium
--
Nanotubes
--
Density functional theory
Аннотация:
A comparative study of file energies and the electronic structure of MgBx nanotubes is performed within the framework of the density functional theory. Different basic compositions (x = 2 for diboride and x = 3 for triboride) and different diameters (3 angstrom < D < 18 angstrom), as well the exterior, interior, and staggered placement of magnesium atoms, are considered. Energy analysis reveals a nontrivial bending behavior of the MgB2 sheets. such that the tubes with exterior and staggered configurations display the energy minima at certain small diameters (of the boron cage sublattice). The semiconducting behavior of narrow MgB2 nanotubes with exterior Mg position was observed.
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Держатели документа:
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
Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Sorokin, P. B.; Avramov, P.V.; Yakobson, B.I.; Chernozatonskii, L.A.
}
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4.
Metal-semiconductor (semimetal) superlattices
on a graphite sheet with vacancies / L. A. Chernozatonskii [et al.]> // JETP Letters. - 2006. -
Vol. 84
,
Is. 3
. - P. 115-118,
DOI
10.1134/S0021364006150033. - Cited References: 25 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
PSEUDOPOTENTIALS
FILMS
Аннотация:
It has been found that periodically closely spaced vacancies on a graphite sheet cause a significant rearrangement of its electronic spectrum: metallic waveguides with a high density of states near the Fermi level are formed along the vacancy lines. In the direction perpendicular to these lines, the spectrum exhibits a semimetal or semiconductor character with a gap where a vacancy miniband is degenerated into impurity levels.
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Держатели документа:
Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119991, Russia
Humboldt Univ, Inst Math, D-12489 Berlin, Germany
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660049, Russia
ИФ СО РАН
Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, 119991, Russian Federation
Institute of Mathematics, Humboldt University of Berlin, Berlin, 12489, Germany
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660049, Russian Federation
Доп.точки доступа:
Chernozatonskii, L. A.; Sorokin, P. B.; Belova, E. E.; Bruning, J.; Fedorov, A. S.; Федоров, Александр Семенович
}
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5.
Revisiting the BaBiO3
semiconductor photocatalyst: synthesis, characterization, electronic structure, and photocatalytic activity / D. S. Shtarev, A. V. Shtareva, R. Kevorkyants [et al.]> // Photochem. Photobiol. Sci. - 2021. -
Vol. 20
,
Is. 9
. - P. 1147-1160,
DOI
10.1007/s43630-021-00086-y. - Cited References: 48. - We wish to thank the Russian Science Foundation for a Grant (Project No. 19-73-10013) in support of our study. The authors are also grateful to the staff of the following Institutes/Centers for their valuable technical assistance and in providing the needed equipment: (i) the Khabarovsk Innovation and Analytical Center of the Yu. A. Kosygin Institute of Tectonics and Geophysics FEB RAS; and (ii) the Resource Centers of the Research Park at Saint-Petersburg State University, especially the Center for Physical Methods of Surface Investigation and the Nanophotonics Center. One of us (NS) is grateful to the staff of the PhotoGreen Laboratory of the University of Pavia, Italy, for their continued hospitality . - ISSN 1474-905X. - ISSN 1474-9092
Перевод заглавия:
Новый анализ полупроводникового фотокатализатора BaBiO3: синтез, характеристика, электронная структура и фотокаталитическая активность
РУБ
Biochemistry & Molecular Biology + Biophysics + Chemistry, Physical
Рубрики:
RHODAMINE-B
OXIDE
DRIVEN
SUPERCONDUCTIVITY
PSEUDOPOTENTIALS
Кл.слова (ненормированные):
Barium bismuthate
--
Visible-light-active photocatalyst
--
Photocatalytic activity
--
Bandgaps
--
Flatband potentials
Аннотация:
This article revisits the properties of BaBiO3 examined extensively in the last two decades because of its electronic properties as a superconductor and as a semiconductor photocatalyst. Solid-state syntheses of this bismuthate have often involved BaCO3 as the barium source, which may lead to the formation of BaBiO3/BaCO3 heterostructures that could have an impact on the electronic properties and, more importantly, on the photocatalytic activity of this bismuthate. Accordingly, we synthesized BaBiO3 by a solid-state route to avoid the use of a carbonate; it was characterized by XRD, SEM, and EDX, while elemental mapping characterized the composition and the morphology of the crystalline BaBiO3 and its thin films with respect to structure, optoelectronic, and photocatalytic properties. XPS, periodic DFT calculations, and electrochemical impedance spectroscopy ascertained the electronic and electrical properties, while Raman and DRS spectroscopies assessed the relevant optical properties. The photocatalytic activity was determined via the degradation of phenol in aqueous media. Although some results accorded with earlier studies, the newer electronic structural data on this bismuthate, together with the photocatalytic experiments carried out in the presence of selective radical trapping agents, led to elucidating some of the mechanistic details of the photocatalytic processes that previous views of the BaBiO3 band structure failed to address or clarify. Analytical refinement of the XRD data inferred the as-synthesized BaBiO3 adopted the C2/m symmetry rather than the I2/m structure reported earlier, while Tauc plots from DRS spectra yielded a bandgap of 2.05 eV versus the range of 1.1–2.25 eV reported by others; the corresponding flatband potentials were 1.61 eV (EVB) and − 0.44 eV (ECB). The photocatalytic activity of BaBiO3 was somewhat greater than that of the well-known Evonik P25 TiO2 photocatalyst under comparable experimental conditions.
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Держатели документа:
Far Eastern Fed Univ, Lab Thin Film Technol, Ajax Bay 10, Vladivostok 690922, Russia.
St Petersburg State Univ, Lab Thotoact Nanocomposite Mat, Ulyanovskaya 1, St Petersburg 198504, Russia.
Far Eastern State Transport Univ, Serysheva 47, Khabarovsk 680021, Russia.
Kirensky Inst Phys, Akad Gorodok 50,Bld 38, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny 79, Krasnoyarsk 660041, Russia.
Univ Pavia, PhotoGreen Lab, Dipartimento Chim, Via Taramelli 12, I-27100 Pavia, Italy.
Доп.точки доступа:
Shtarev, Dmitry S.; Shtareva, Anna, V; Kevorkyants, Ruslan; Molokeev, M. S.; Молокеев, Максим Сергеевич; Serpone, Nick; Russian Science FoundationRussian Science Foundation (RSF) [19-73-10013]
}
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6.
Strong Electron Correlations
Determine Energetic Stability and Electronic Properties of Er-Doped Goldberg-Type Silicon Quantum Dots / P. V. Avramov [et al.]> // J. Phys. Chem. C. - 2009. -
Vol. 113
,
Is. 36
. - P. 15964-15968,
DOI
10.1021/jp904996e. - Cited Reference Count: 43. - Гранты: This work was supported by a CREST (Core Research for Evolutional Science and Technology) grant in the Area of High Performance Computing for Multiscale and Multiphysics Phenomena from the Japan Science and Tcchnology Agency (JST) and a collaborative RFBR-JSPS Grant 0902-92107-Phi. One of the authors (S.I.) also acknowledges support by the Program for Improvement of Research Environment for Young Researchers from Special Coordination Funds for Promoting Science and Technology (SCF) commissioned by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. - Финансирующая организация: Japan Science and Tcchnology Agency (JST); RFBR-JSPS Grant; Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan . - SEP 10. - ISSN 1932-7447
Рубрики:
IMPLANTED POROUS SILICON
AUGMENTED-WAVE METHOD
MU M LUMINESCENCE
SI NANOCRYSTALS
THIN-FILMS
BASIS-SET
ERBIUM
PHOTOLUMINESCENCE
DENSITY
PSEUDOPOTENTIALS
Кл.слова (ненормированные):
Ab initio
--
Atomic structure
--
Density functionals
--
Empirical pseudo-potential
--
Endohedrals
--
Energetic stability
--
Er-doped
--
Erbium complexes
--
Erbium ion
--
Experimental data
--
Hartree-fock
--
Many body perturbation theory
--
Mass centers
--
Perturbation approach
--
Plane wave
--
Pseudopotentials
--
Quantum Dot
--
Silicon quantum dots
--
Strong binding
--
Strong electron correlations
--
Theoretical result
--
Crystal atomic structure
--
Electron correlations
--
Electron density measurement
--
Electronic properties
--
Electronic structure
--
Erbium
--
Perturbation techniques
--
Structural optimization
--
Semiconductor quantum dots
Аннотация:
Atomic and electronic structures of Goldberg-type silicon quantum dots and their endohedral erbium complexes were studied using ab initio and plane wave pseudopotential density functional and Moller-Plesset many-body perturbation theories. During atomic structure optimizations, the erbium ions occupy mass centers inside the central hollows of quantum dots of different symmetries. It was found that strong electron correlations within the Er 4f shell taken into account by empirical pseudopotential and post-Hartree-Fock perturbation approaches are responsible for strong binding of Er ions to quantum dots. We elucidate the effects of symmetry and discuss theoretical results in comparison to available experimental data,
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http://pubs.acs.org/doi/abs/10.1021/jp904996e.
Держатели документа:
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Natl Inst Adv Ind Sci & Technol, RICS, Tsukuba, Ibaraki 3058568, Japan
Nagoya Univ, Inst Adv Res, Nagoya, Aichi 4648602, Japan
Nagoya Univ, Dept Chem, Nagoya, Aichi 4648602, Japan
Kyoto Univ, Fukui Inst Fundamental Chem, Sakyo Ku, Kyoto 6068103, Japan
Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Kuzubov, A. A.; Кузубов, Александр Александрович; Fedorov, D. G.; Irle, S.; Morokuma, K.
}
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7.
Superlattices consisting of
"lines" of adsorbed hydrogen atom pairs on graphene / L. A. Chernozatonskii [et al.]> // JETP Letters. - 2007. -
Vol. 85
,
Is. 1
. - P. 77-81,
DOI
10.1134/S002136400701016X. - Cited References: 25 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
CARBON NANOTUBES
ELECTRON-GAS
GRAPHITE
FILMS
PSEUDOPOTENTIALS
Аннотация:
The structures and electron properties of new superlattices formed on graphene by adsorbed hydrogen molecules are theoretically described. It has been shown that superlattices of the (n, 0) zigzag type with linearly arranged pairs of H atoms have band structures similar to the spectra of (n, 0) carbon nanotubes. At the same time. superlattices of the (n, n) type with a "staircase" of adsorbed pairs of H atoms are substantially metallic with a high density of electronic states at the Fermi level and this property distinguishes their spectra from the spectra of the corresponding (n, n) nanotubes. The features of the spectra have the Van Hove form, which is characteristic of each individual superlattice. The possibility of using such planar structures with nanometer thickness is discussed.
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Держатели документа:
Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia
Humboldt Univ, Inst Math, D-12489 Berlin, Germany
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660049, Russia
ИФ СО РАН
Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, 119334, Russian Federation
Institute of Mathematics, Humboldt University of Berlin, Berlin, 12489, Germany
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660049, Russian Federation
Доп.точки доступа:
Chernozatonskii, L. A.; Sorokin, P. B.; Belova, E. E.; Bruning, J.; Fedorov, A. S.; Федоров, Александр Семенович
}
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8.
The anisotropic thermal
expansion of non-linear optical crystal BaAlBO3F2 below room temperature / X. X. Jiang [et al.]> // Front. Chem. - 2018. -
Vol. 6
. - Ст. 252,
DOI
10.3389/fchem.2018.00252. - Cited References: 31. - This work was supported by the National Scientific Foundations of China (Grants 11474292, 51702330, 11611530680, 91622118, and 91622124), Russian Foundation for Basic Research (Grant 17-52-53031), the Special Foundation of the Director of Technical Institute of Physics and Chemistry (TIPC) and the Youth Innovation Promotion Association, CAS (outstanding member for ZL and Grant 2017035 for XJ). . - ISSN 2296-2646
Перевод заглавия:
Анизотропное тепловое расширение ниже комнатной температуры нелинейнооптического кристалла BaAlBO3F2
РУБ
Chemistry, Multidisciplinary
Рубрики:
LASER
GENERATION
PSEUDOPOTENTIALS
COEFFICIENTS
YAG
Кл.слова (ненормированные):
BABF
--
anisotropic thermal expansion
--
phonon stimulation
--
NLO optical
--
property
--
low temperature
Аннотация:
Thermal expansion is a crucial factor for the performance of laser devices, since the induced thermal stress by laser irradiation would strongly affect the optical beam quality. For BaAlBO3F2 (BABF), a good non-linear optical (NLO) crystal, due to the highly anisotropic thermal expansion its practical applications are strongly affected by the “tearing” stress with the presence of local overheating area around the laser spot. Recently, the strategy to place the optical crystals in low-temperature environment to alleviate the influence of the thermal effect has been proposed. In order to understand the prospect of BABF for this application, in this work, we investigated its thermal expansion behavior below room temperature. The variable-temperature XRD showed that the ratio of thermal expansion coefficient between along c- and along a(b)- axis is high as 4.5:1 in BABF. The Raman spectrum combined with first-principles phonon analysis revealed that this high thermal expansion anisotropy mainly ascribe to progressive stimulation of the respective vibration phonon modes related with the thermal expansion along a(b)- and c-axis. The good NLO performance in BABF can be kept below room temperature. The work presented in this paper provides an in-depth sight into the thermal expansion behavior in BABF, which, we believe, would has significant implication to the manipulation in atomic scale on the thermal expansion of the materials adopted in strong-field optical facility.
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Держатели документа:
Chinese Acad Sci, Tech Inst Phys & Chem, Beijing, Peoples R China.
Univ Chinese Acad Sci, Beijing, Peoples R China.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk, Russia.
Siberian Fed Univ, Dept Engn Phys & Radioelect, Krasnoyarsk, Russia.
Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing, Peoples R China.
Tianjin Univ Technol, Inst Funct Crystals, Tianjin, Peoples R China.
Доп.точки доступа:
Jiang, Xingxing; Wang, Naizheng; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wang, Wei; Guo, Shibin; Huang, Rongjin; Li, Laifeng; Hu, Zhanggui; Lin, Zheshuai
}
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