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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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Calculating the energy of vacancies and adatoms in a hexagonal SiC monolayer / A. A. Kuzubov [et al.] // Russ. J. Phys. Chem. A. - 2012. - Vol. 86, Is. 7. - P. 1091-1095, DOI 10.1134/S0036024412070138. - Cited References: 21 . - ISSN 0036-0244

РУБ Chemistry, Physical
Рубрики:
INITIO MOLECULAR-DYNAMICS
ELECTRONIC-PROPERTIES
ABSORPTION-SPECTRA
Кл.слова (ненормированные):
silicon carbide -- defects -- adatoms -- density functional method
Аннотация: It is noted that the development of semiconductor SiC-electronics is prevented by a low quality of grown silicon carbide single crystals. It is found that structural defects of a substrate penetrating into an epitaxial layer upon subsequent homoepitaxial growth can considerably degrade a device's characteristics. We investigate the effect of the deformation of a hexagonal SiC monolayer on vacancy stability and material properties, and study the processes of silicon and carbon adatom migration over a surface of SiC.

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Публикация на русском языке Расчет энергии вакансий и адатомов в монослое гексагонального SiC [Текст] / А. А. Кузубов [и др.] // Журн. физ. химии. - 2012. - Т. 86 № 7. - С. 1207-1211

Держатели документа:
[Kuzubov, A. A.
Eliseeva, N. S.
Tomilin, F. N.
Tolstaya, A. V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Kuzubov, A. A.
Krasnov, P. O.
Tomilin, F. N.
Fedorov, A. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Kuzubov, A. A.
Krasnov, P. O.] Siberian State Technol Univ, Krasnoyarsk 660049, Russia

Доп.точки доступа:
Kuzubov, A. A.; Кузубов, Александр Александрович; Eliseeva, N. S.; Krasnov, P. O.; Краснов, Павел Олегович; Tomilin, F. N.; Томилин, Феликс Николаевич; Fedorov, A. S.; Федоров, Александр Семенович; Tolstaya, A. V.
}
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Competing magnetic states in silicene and germanene 2D ferromagnets / D. V. Averyanov, I. S. Sokolov, M. S. Platunov [et al.] // Nano Res. - 2020. - Vol. 13, Is. 12. - P. 3396-3402, DOI 10.1007/s12274-020-3027-y. - Cited References: 58. - This work was supported by National Research Center (NRC) "Kurchatov Institute" (No. 1359, characterization) and the Russian Science Foundation (No. 19-19-00009 (synthesis) and No. 20-79-10028 (magnetization measurements)). D. V. A. also acknowledges support from the President's scholarship (SP 1398.2019.5). The measurements have been carried out using equipment of the resource centers of electrophysical and electron microscopy techniques in NRC "Kurchatov Institute" . - ISSN 1998-0124. - ISSN 1998-0000

РУБ Chemistry, Physical + Nanoscience & Nanotechnology + Materials Science,
Рубрики:
RAY CIRCULAR-DICHROISM
ABSORPTION
Кл.слова (ненормированные):
silicene -- germanene -- 2D ferromagnetism -- X-ray magnetic circular dichroism (XMCD) -- monolayer
Аннотация: Two-dimension (2D) magnets have recently developed into a class of stoichiometric materials with prospective applications in ultra-compact spintronics and quantum computing. Their functionality is particularly rich when different magnetic orders are competing in the same material. Metalloxenes REX2 (RE = Eu, Gd; X = Si, Ge), silicene or germanene — heavy counterparts of graphene — coupled with a layer of rare-earth metals, evolve from three-dimension (3D) antiferromagnets in multilayer structures to 2D ferromagnets in a few monolayers. This evolution, however, does not lead to fully saturated 2D ferromagnetism, pointing at a possibility of coexisting/competing magnetic states. Here, REX2 magnetism is explored with element-selective X-ray magnetic circular dichroism (XMCD). The measurements are carried out for GdSi2, EuSi2, GdGe2, and EuGe2 of different thicknesses down to 1 monolayer employing K absorption edges of Si and Ge as well as M and L edges of the rare-earths. They access the magnetic state in REX2 and determine the seat of magnetism, orbital, and spin contributions to the magnetic moment. High-field measurements probe remnants of the bulk antiferromagnetism in 2D REX2. The results provide a new platform for studies of complex magnetic structures in 2D materials.

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Держатели документа:
Natl Res Ctr Kurchatov Inst, Kurchatov Sq 1, Moscow 123182, Russia.
ESRF European Synchrotron, CS 40220, F-38043 Grenoble 9, France.
ALBA Synchrotron Light Source, Barcelona 08290, Spain.
LOrme Merisiers, Synchrotron SOLEIL, F-91192 Gyf Sur Yvette, France.
RAS, Kirensky Inst Phys, Fed Res Ctr KSC SB, Akad Gorodok 50,Bld 38, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Averyanov, D. V.; Sokolov, Ivan S.; Platunov, M. S.; Платунов, Михаил Сергеевич; Wilhelm, Fabrice; Rogalev, Andrei; Gargiani, Pierluigi; Valvidares, Manuel; Jaouen, Nicolas; Parfenov, Oleg E.; Taldenkov, Alexander N.; Karateev, Igor A.; Tokmachev, Andrey M.; Storchak, V. G.
}
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Contact-induced spin polarization of monolayer hexagonal boron nitride on Ni(111) / M. Ohtomo [et al.] // Appl. Phys. Lett. - 2014. - Vol. 104, Is. 5. - Ст. 51604, DOI 10.1063/1.4863324. - Cited References: 20. - This study was supported by the Grant-in-Aid for Scientific Research (Grant Nos. 23860067 and 24760033) from the Japan Society for the Promotion of Science. . - ISSN 0003-6951. - ISSN 1077-3118

РУБ Physics, Applied
Рубрики:
METASTABLE DEEXCITATION SPECTROSCOPY
   METAL-SURFACES
   FILMS
   TRANSITION
Аннотация: Hexagonal boron nitride (h-BN) is a promising barrier material for graphene spintronics. In this Letter, spin-polarized metastable de-excitation spectroscopy (SPMDS) is employed to study the spin-dependent electronic structure of monolayer h-BN/Ni(111). The extreme surface sensitivity of SPMDS enables us to elucidate a partial filling of the in-gap states of h-BN without any superposition of Ni 3d signals. The in-gap states are shown to have a considerable spin polarization parallel to the majority spin of Ni. The positive spin polarization is attributed to the pi-d hybridization and the effective spin transfer to the nitrogen atoms at the h-BN/Ni(111) interface. (C) 2014 AIP Publishing LLC.

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Держатели документа:
Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan
Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Ohtomo, M.; Yamauchi, Y.; Kuzubov, A. A.; Кузубов, Александр Александрович; Eliseeva, N. S.; Елисеева, Наталья Сергеевна; Avramov, P. V.; Аврамов, Павел Вениаминович; Entani, S.; Matsumoto, Y.; Naramoto, H.; Sakai, S.
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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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    Tikhonova, L. V.
    Effect of the additional Se layer on the electronic structure of iron-based superconductor FeSe/SrTiO3 / L. V. Tikhonova, M. M. Korshunov // J. Supercond. Novel Magn. - 2020. - Vol. 33, Is. 1. - P. 171-176, DOI 10.1007/s10948-019-05253-y. - Cited References: 70. - This work was supported in part by “BASIS” Foundation for Development of Theoretical Physics and Mathematics. . - ISSN 1557-1939
   Перевод заглавия: Влияние дополнительного слоя селена на электронную структуру сверхпроводника на основе железа FeSe/SrTiO3
Кл.слова (ненормированные):
Fe-based superconductors -- Monolayer FeSe -- SrTiO3 -- Density functional theory
Аннотация: We use density functional theory to study the structure and the band structure of the monolayer FeSe deposited on the SrTiO3 substrate with the additional layer of Se between them. The top of the SrTiO3 is formed by the double TiOx layer with and without oxygen vacancies. Several structures with different arrangements of the additional Se atoms above the double TiOx layer are considered. Equilibrium structures were found, and the band structures for them were obtained. Near the Γ = (0,0,0) point of the Brillouin zone, the hole Fermi surface pockets persist and, additionally, an electron pocket appears. Thus, neither the presence of the additional Se layer nor the oxygen vacancies in the double TiOx layer lead to the sinking of hole bands below the Fermi level near the Γ point. The necessity to include the strong electronic correlations into account is discussed.

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Держатели документа:
Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович
}
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    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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Electro-optical response of a monolayer polymer dispersed nematic liquid crystal film doped with surfactant / V. A. Loiko, A. V. Konkolovich, A. A. Miskevich [et al.] // Liquid Crystal Polymer Nanocomposites : Woodhead Publishing, 2022. - Chapter 7. - P. 163-211, DOI 10.1016/B978-0-12-822128-0.00006-6. - Cited References: 86
Кл.слова (ненормированные):
Polymer dispersed liquid crystal film -- Liquid crystal droplet -- Transmission -- Angular distribution of scattered light -- Quenching effect -- Symmetry breaking effect -- Photonic band gap
Аннотация: Light scattering and transmission by a monolayer polymer dispersed liquid crystal film containing liquid crystal droplets with inhomogeneous anchoring of liquid crystal molecules at the polymer-droplet interface is considered theoretically and experimentally. The developed optical model is based on the anomalous diffraction and interference approximations of the theory of scattering of waves. It is applied to describe the interference quenching effect for the coherently transmitted light and electrically controllable symmetry breaking effect in small-angle structure of light scattered by film containing droplets with inhomogeneous anchoring. The analysis of transmittance and reflectance of the one-dimensional photonic crystals composed of monolayers is carried out. The formation of the photonic band gaps is analyzed.

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Держатели документа:
Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Belarus
Kirensky Institute of Physics, Federal Research Center-Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Military Academy of the Republic of Belarus, Belarus

Доп.точки доступа:
Loiko, V. A.; Konkolovich, A. V.; Miskevich, A. A.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Shabanov, A. V.; Шабанов, Александр Васильевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
}
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    Electro-optical response of a monolayer polymer dispersed nematic liquid crystal film doped with surfactant / V. A. Loiko, A. V. Konkolovich, A. A. Misckevich [et al.] // Liquid crystal polymer nanocomposites / ed.: P. M. Visakh [et al.] : Elsevier, 2022. - Chap. 7. - P. 163-211. - (Woodhead publishing in materials), DOI https://doi.org/10.1016/B978-0-12-822128-0.00006-6. - References: 86 . - ISBN 978-0-12-822128-0
   Перевод заглавия: Электро-оптический отклик монослоя нематического жидкого кристалла, допированного сурфактантом, диспергированного в полимере
Аннотация: Light scattering and transmission by a monolayer polymer dispersed liquid crystal film containing liquid crystal droplets with inhomogeneous anchoring of liquid crystal molecules at the polymer-droplet interface is considered theoretically and experimentally. The developed optical model is based on the anomalous diffraction and interference approximations of the theory of scattering of waves. It is applied to describe the interference quenching effect for the coherently transmitted light and electrically controllable symmetry breaking effect in small-angle structure of light scattered by film containing droplets with inhomogeneous anchoring. The analysis of transmittance and reflectance of the one-dimensional photonic crystals composed of monolayers is carried out. The formation of the photonic band gaps is analyzed.

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Доп.точки доступа:
Visakh, P. M. \ed.\; Semkin, Artem \ed.\; Özdemir, Zeynep Güven \ed.\; Loiko, V. A.; Konkolovich, A. V.; Misckevich, A. A.; Мискевич А. А.; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Shabanov, A. V.; Шабанов, Александр Васильевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
}
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10.

Electronic structure and minimal models for flat and corrugated CuO monolayers: An ab initio study / A. A. Slobodchikov, I. A. Nekrasov, L. V. Begunovich [et al.] // Materials. - 2023. - Vol. 16, Is. 2. - Ст. 658, DOI 10.3390/ma16020658. - Cited References: 24. - This research was in part funded by the Russian Science Foundation grant number 23-22-00372 . - ISSN 1996-1944
Кл.слова (ненормированные):
CuO monolayer -- band structure -- DFT -- minimal orbital model -- Wannier functions projections
Аннотация: CuO atomic thin monolayer (mlCuO) was synthesized recently. Interest in the mlCuO is based on its close relation to CuO2 layers in typical high temperature cuprate superconductors. Here, we present the calculation of the band structure, the density of states and the Fermi surface of the flat mlCuO as well as the corrugated mlCuO within the density functional theory (DFT) in the generalized gradient approximation (GGA). In the flat mlCuO, the Cu-3dx2−y2 band crosses the Fermi level, while the Cu-3dxz,yz hybridized band is located just below it. The corrugation leads to a significant shift of the Cu-3dxz,yz hybridized band down in energy and a degeneracy lifting for the Cu-3dx2−y2 bands. Corrugated mlCuO is more energetically favorable than the flat one. In addition, we compared the electronic structure of the considered CuO monolayers with bulk CuO systems. We also investigated the influence of a crystal lattice strain (which might occur on some interfaces) on the electronic structure of both mlCuO and determined the critical strains of topological Lifshitz transitions. Finally, we proposed a number of different minimal models for the flat and the corrugated mlCuO using projections onto different Wannier functions basis sets and obtained the corresponding Hamiltonian matrix elements in a real space.

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Держатели документа:
Institute of Electrophysics, Russian Academy of Sciences, Ural Branch, 620016 Yekaterinburg, Russia
Federal Research Center KSC SB RAS, Akademgorodok, 660036 Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Slobodchikov, Anatoly A.; Nekrasov, Igor A.; Begunovich, L. V.; Бегунович, Людмила Витальевна; Makarov, I. A.; Макаров, Илья Анатольевич; Korshunov, M. M.; Коршунов, Максим Михайлович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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