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A key role of tensile strain and surface termination in formation and properties of La0.7Sr0.3MnO3 composites with carbon nanotubes / E. A. Kovaleva [et al.] // Comput. Mater. Sci. - 2017. - Vol. 139. - P. 125-131, DOI 10.1016/j.commatsci.2017.07.021. - Cited References: 39. - This work was supported by National Research Foundation of Republic of Korea under Grant No. NRF-2017R1A2B4004440 and the government contract of the Ministry of Education and Science of the Russian Federation to Siberian Federal University (Grant No. 16.1455.2017/PCh). The authors would like to thank Joint Supercomputer Center of RAS, Moscow; Center of Equipment for Joint Use of Siberian Federal University, Krasnoyarsk; and Information Technology Centre, Novosibirsk State University for providing the access to their supercomputers. P.B.S gratefully acknowledges the financial supports of the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST «MISiS» (No. К2-2017-001) and RFBR, according to the research project No. 16-32-60138 mol_a_dk. E.A. Kovaleva would also like to acknowledge the program of the President of Russian Federation for Leading Scientific Schools Support (Grant No. 2016 NSh-7559.2016.2). . - ISSN 0927-0256
Кл.слова (ненормированные):
Carbon nanotubes -- LSMO -- Interface -- Spin polarization
Аннотация: Atomic and electronic structure of LSMO-based composites with carbon nanotubes were studied by means of density functional theory with respect to the termination of LSMO surface. The deformation of the tubes caused by the lattice mismatch with the substrate leads to a major change in their electronic structure. The surface terminated with Mn-O layer provides much stronger interaction with carbon nanotubes than Sr-O terminated one does. The interaction with transition metal atoms is essential for spin polarization of the nanotube while no spin injection was observed for Sr-O-supported tubes. © 2017 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
National University of Science and Technology MISiS, 4 Leninskiy prospekt, Moscow, Russian Federation

Доп.точки доступа:
Kovaleva, E. A.; Kuzubov, A. A.; Кузубов, Александр Александрович; Avramov, P. V.; Kholtobina, A. S.; Kuklin, A. V.; Куклин, Артем Валентинович; Tomilin, F. N.; Томилин, Феликс Николаевич; Sorokin, P. B.
}
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Ab initio and empirical modeling of lithium atoms penetration into silicon / N. S. Mikhaleva [et al.] // Comput. Mater. Sci. - 2015. - Vol. 109. - P. 76-83, DOI 10.1016/j.commatsci.2015.06.024. - Cited References: 69. - The authors would like to thank the Institute of Computational Modeling SB RAS, Krasnoyarsk, Information Technology Centre Novosibirsk State University, for providing access to their computational resources. The reported study was supported by RFBR, research project No. 14-02-31071, 14-02-31309, 12-02-00640, by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project No. NSh-2886.2014.2), Increase Competitiveness Program of NUST "MISiS" (No. K2-2015-033). The authors also would like to thank Prof. Stephan Irle and L.R. Moskvina for fruitful discussions and helpful ideas. . - ISSN 0927-0256

РУБ Materials Science, Multidisciplinary
Рубрики:
LONG CYCLE LIFE
   CORE-LEVEL SPECTROSCOPY
   CARBON-COATED SILICON
   AUGMENTED-WAVE METHOD
   ION BATTERIES
   MOLECULAR-DYNAMICS
   INTERATOMIC POTENTIALS
   ELECTRONIC-STRUCTURE
   CRYSTALLINE SILICON
   SI(100)2X1 SURFACE
Кл.слова (ненормированные):
Li-ion batteries -- Silicon -- Surface diffusion -- Li diffusion -- Density functional theory -- Molecular dynamics
Аннотация: A process of lithium atoms penetration into silicon (1 0 0) subsurface layers was investigated with the help of DFT method. It was shown that, while the concentration of lithium adatoms on reconstructed (1 0 0) silicon surface is low, the bonding energy of lithium atoms in the subsurface layers is smaller than the bonding energy on the surface, so lithium atoms are unlikely to migrate into the crystal. When the (1 0 0) silicon surface is covered by 2 layers of lithium, migration into the subsurface layer becomes favorable. In addition to this, the reconstruction of the surface changes to the form with symmetric dimers as the concentration increases. Thus, all possible lithium migration paths become energy-wise equal, so the rate of lithium atom transfer into silicon crystal rises. In addition to the ab initio calculations, an ad-hoc empirical interatomic potential was developed and the kinetics of lithium diffusion into silicon were studied. It was shown that lithium penetration proceeds in a layer-by-layer way with a sharp border between undoped and lithiated silicon. This is accounted for the fact that, once a tetrahedral interstice is occupied by a lithium atom, the migration barriers between the adjacent interstices become lower and the rate of diffusion increases. © 2015 Elsevier B.V. All rights reserved.

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Держатели документа:
L.V. Kirensky Institute of Physics SB RAS, 50 bld. 38 Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
National University of Science and Technology MISiS, 4 Leninskiy pr., Moscow, Russian Federation

Доп.точки доступа:
Mikhaleva, N. S.; Михалева, Наталья Сергеевна; Visotin, M. A.; Popov, Z. I.; Попов, Захар Иванович; Kuzubov, A. A.; Кузубов, Александр Александрович; Fedorov, A. S.; Федоров, Александр Семенович
}
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Fedorov, A. S.
Ab initio study of hydrogen chemical adsorption on platinum surface/carbon nanotube join system / A. S. Fedorov, P. B. Sorokin, A. A. Kuzubov // Phys. Status Solidi B. - 2008. - Vol. 245, Is. 8. - P. 1546-1551, DOI 10.1002/pssb.200844155. - Cited References: 31 . - ISSN 0370-1972

РУБ Physics, Condensed Matter
Рубрики:
WALLED CARBON NANOTUBES
   MOLECULAR-DYNAMICS
   ROOM-TEMPERATURE
   STORAGE
   ENERGY
   THERMODYNAMICS
   GRAPHITE
   DENSITY
   POINTS
Аннотация: The process of hydrogen chemical adsorption on platinum cluster/single wall carbon nanotube (CNT) join surfaces is modelled at various temperatures and pressures. For that, the adsorption energy of hydrogen atoms on surfaces of both platinum (111) plate and CNT (5,5) or (8,8) types is calculated by density functional theory with the PBE approximation. At various temperatures the hydrogen atom hopping rate on both platinum and CNT surfaces is calculated by the transition state theory. Furthermore the hydrogen hopping rate from the platinum surface to the attached nanotube is obtained by calculation of the total energy profile. It is proved that hydrogen atoms can migrate easily at the platinum surface at all temperatures, but at the CNT surface they can migrate beginning at 400-500 K. By calculation of chemical potentials of hydrogen in gas or on CNT or platinum cluster surfaces the equilibrium density of adsorbed hydrogen was calculated at different temperatures and pressures. It is established that for all temperatures in the range 300-900 K and for all pressures less than 500 bar, the hydrogen is dissociated and chemically adsorbed on the platinum surface very effectively, but surface site occupation by hydrogen on attached CNT surface is rather small. But if CNT vacancies are present in the tube structure and the temperature is lower then 450 K, hydrogen atoms can be adsorbed effectively enough on these vacancies. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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Держатели документа:
[Fedorov, Alexander S.
Sorokin, Pavel B.
Kuzubov, Alexander A.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Fedorov, Alexander S.] Moscow Railroad Transport Engn Inst, Krasnoyarsk 660028, Russia
[Sorokin, Pavel B.
Kuzubov, Alexander A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Railroad Transport Institute, 660028 Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodniy av, 660041 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sorokin, P. B.; Kuzubov, A. A.; Кузубов, Александр Александрович; Федоров, Александр Семенович
}
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Ab-initio investigation of hydrogen absorption by magnesium nanoparticles [Text] / A. S. Fedorov, G. N1. Churilov [et al.] // Carbon Nanomaterials in Clean-Energy Hydrogen Systems : Proceedings of the NATO Advanced Research Workshop on Using Carbon Nanomaterials in Clean-Energy Hydrogen Systems Sudak, Crimea, Ukraine 22–28 September 2007 / red. Baranowski, B.; Zaginaichenko, S.; Schur, D.; Skorokhod, V.; Veziroglu, A. : Springer, 2008. - P603-610. - (SNATO Science for Peace and Security Series Subseries: NATO Science for Peace and Security Series C: Environmental Security), DOI 10.1007/978-1-4020-8898-8_75 . - ISBN 1874-6519

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Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Churilov, G. N.; Чурилов, Григорий Николаевич; Kuzubov, A.A.; Serjantova, M.V.; "Carbon Nanomaterials in Clean-Energy Hydrogen Systems", national conference(2008 ; Sep. ; 22-28 ; Sudak, Crimea)
}
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Ab-initio investigation of thermoactivated directional transport of hydrogen molecules inside narrow carbon nanotubes / A. S. Fedorov, A. F. Sadreev // Physica status solidi B - Basic Solid State Physics. - 2009. - Т. 246, № 11-12. - P. 2598-2601, DOI 10.1002/pssb.200982285 . - ISSN 0370-1972. - ISSN 1521-3951

ГРНТИ

РИНЦ
Держатели документа:
Kirensky Institute of Physics,Siberian Division,Russian Academy of Sciences
Krasnoyarsk Railway Transport Institute
Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Sadreev, A. F.; Садреев, Алмаз Фаттахович
}
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Fedorov, A. S.
Ab-initio investigation of thermoactivated directional transport of hydrogen molecules inside narrow carbon nanotubes / A. S. Fedorov, A. F. Sadreev // Phys. Status Solidi B. - 2009. - Vol. 246: 23rd Winterschool on Electronic Properties of Novel Materials (MAR 14, 2009, Kirchberg, GERMANY), Is. 11. - P. 2598-2601, DOI 10.1002/pssb.200982285. - Cited References: 21. - A.S.Fedorov thanks the Institute of Computer Modeling (Krasnoyarsk, Russia) and the Joint Supercomputer Center (Moscow) for an assistence in quantum chemical calculations. . - ISSN 0370-1972

РУБ Physics, Condensed Matter
Рубрики:
DIFFUSION
ENERGY
Аннотация: Using the pseudopotential DFT and the empirical potential methods we calculate the potential acting to the hydrogen molecules in narrow single-wall carbon nanotubes (SWCNT) (6,0),(7,0) and (3,3). The potential forms a goffered potential surface and can be approximated as V(z, r, phi) approximate to V(0) sin(2 pi z/a) + V(r). We show that in these SWCNTs transport of molecules is given mainly by thermoactivated hoppings between minima of the periodic potential along the tube axis. Taking into account that hydrogen density distribution inside nanotube is stationary and assuming the temperature is changed linearly along the SWCNT length we show that the H(2) density is sufficiently variated, especially for the case of (6,0)SWCNT where the density on both SWCNT ends are different at similar to 30 times when the temperature is changed along the SWCNT from 300K to 1200K. Suppose that H2 molecules can penetrate in the both open SWCNT ends, the molecules would move in the direction of the temperature decreasing. This effect may be used potentially to build up a molecular pump driven by the temperature gradient along narrow nanotube. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Держатели документа:
[Fedorov, A. S.
Sadreev, A. F.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
[Fedorov, A. S.] Krasnoyarsk Railway Transport Inst, Krasnoyarsk 660028, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Krasnoyarsk Railway Transport Institute, 660028 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Федоров, Александр Семенович
}
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Ab-initio study of hydrogen chemical adsorption on the platinum surface/carbon nanotube join system [Text] / A. S. Fedorov, P. B. Sorokin, A. A. Kuzubov // Physica status solidi B - Basic Solid State Physics. - 2008. - Vol. 245, № 8. - P1546-1551

Доп.точки доступа:
Fedorov, A.S.; Sorokin, P.B.; Kuzubov, A. A.
Свободных экз. нет}
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Bolotskikh, L. T.
Amplified phase-conjugate reflection of lambda = 10.51 MU-M radiation in gaseous SF6 / L. T. Bolotskikh, A. K. POPOV // Appl. Phys. B. - 1983. - Vol. 31, Is. 3. - P. 191-192, DOI 10.1007/BF00688842. - Cited References: 7 . - ISSN 0721-7269

РУБ Physics, Applied

Кл.слова (ненормированные):
42.65 -- LASERS, CARBON DIOXIDE -- SULFUR COMPOUNDS -- SULFUR HEXAFLUORIDE -- LASER BEAMS

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Держатели документа:
Siberian Branch, L. V. Kirensky, Institute of Physics, USSR Academy of Sciences, Krasnoyarsk, SU-660036, Russia

Доп.точки доступа:
Popov, A. K.; Попов, Александр Кузьмич
}
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Arc synthesis of silicon-doped heterofullerenes in plasma at atmospheric pressure / N. V. Bulina [et al.] // Fullerenes Nanotubes and Carbon Nanostructures. - 2007. - Т. 15, № 5. - С. 395-400, DOI 10.1080/15363830701512229 . - ISSN 1536-383X. - ISSN 1536-4046

ГРНТИ

РИНЦ
Держатели документа:
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences
Max-Planck-Institut fur Kernphysik
Доп.точки доступа:
Bulina, N. V.; Булина, Наталья Васильевна; Lopatin, V. A.; Лопатин, Владислав Александрович; Vnukova, N. G.; Внукова, Наталья Григорьевна; Osipova, I. V.; Осипова, Ирина Владимировна; Churilov, G. N.; Чурилов, Григорий Николаевич; Krtschmer, W.
}
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10.

Band-gap unification of partially Si-substituted single-wall carbon nanotubes / P. V. Avramov [et al.] // Phys. Rev. B. - 2006. - Vol. 74, Is. 24. - Ст. 245417, DOI 10.1103/PhysRevB.74.245417. - Cited References: 72 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SILICON-CARBIDE NANOTUBES
   DENSITY-FUNCTIONAL THEORY
   TOTAL-ENERGY CALCULATIONS
   WAVE BASIS-SET
   ELECTRONIC-STRUCTURE
   AB-INITIO
   NANORODS
   EXCITATIONS
   TRANSITION
   NANOWIRES
Аннотация: The atomic and electronic structure of a set of pristine single wall SiC nanotubes as well as Si-substituted carbon nanotubes and a SiC sheet was studied by the local-density approximation (LDA) plane wave band structure calculations. Consecutive substitution of carbon atoms by Si leads to a gap opening in the energetic spectrum of the metallic (8,8) SWCNT with approximately quadratic dependence of the band gap upon the Si concentration. The same substitution for the semiconductor (10,0) single wall carbon nanotubes (SWCNT) results in a band gap minimum (0.27 eV) at similar to 25% of Si concentration. In the Si concentration region of 12-18 %, both types of nanotubes have less than 0.5 eV direct band gaps at the Gamma-Gamma point. The calculation of the chiral (8,2) SWSi0.15C0.85NT system gives a similar (0.6 eV) direct band gap. The regular distribution of Si atoms in the atomic lattice is by similar to 0.1 eV/atom energetically preferable in comparison with a random distribution. Time dependent density functional theory (DFT) calculations showed that the silicon substitution sufficiently increases (roughly by one order of magnitude) the total probability of optical transitions in the near infrared region, which is caused by the opening of the direct band gap in metallic SWCNTs, the unification of the nature and energy of the band gaps of all SWCNT species, the large values of Si3p parallel to r parallel to Si3s radial integrals and participation of Si3d states in chemical bonding in both valence and conductance bands.

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Держатели документа:
Japan Atom Energy Res Inst, Adv Sci Res Ctr, Takasaki Branch, Takasaki, Gumma 3701292, Japan
RAS, SB, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
RAS, Inst Biochem Phys, Moscow 119991, Russia
AIST, Res Inst Computat Sci, Tsukuba, Ibaraki 3058568, Japan
Kyoto Univ, Dept Energy Sci & Technol, Sakyo Ku, Kyoto 6068501, Japan
ИФ СО РАН
Takasaki-branch, Advanced Science Research Center, Japan Atomic Energy Agency, Takasaki, 370-1292, Japan
L.V. Kirensky Institute of Physics SB RAS, 660036 Krasnoyarsk, Russian Federation
Institute of Biochemical Physics of RAS, 119991 Moscow, Russian Federation
Research Institute for Computational Science, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, 305-8568, Japan
Department of Energy Science and Technology, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan

Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Sorokin, P. B.; Fedorov, A. S.; Федоров, Александр Семенович; Fedorov, D. G.; Maeda, Y.
}
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