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Metal-dielectric polarization-preserving anisotropic mirror for chiral optical Tamm state / N. V. Rudakova, R. G. Bikbaev, P. S. Pankin [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 2. - Ст. 234, DOI 10.3390/nano12020234. - Cited References: 46. - The reported study was funded by RFBR and MOST according to the research project No. 19-52-52006. This work was also supported by the Higher Education Sprout Project of the National Yang Ming Chiao Tung University and Ministry of Education and the Ministry of Science and Technology (MOST) No. 108-2923-E-009-003-MY3 . - ISSN 2079-4991

РУБ Chemistry, Multidisciplinary + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
PLASMON
   MODES
   PHASE
   ABSORPTION
   RESONANCE
Кл.слова (ненормированные):
chiral optical Tamm state -- polarization-preserving anisotropic mirror -- Q-factor -- coupled mode theory
Аннотация: This numerical study demonstrates the possibility of exciting a chiral optical Tamm state localized at the interface between a cholesteric liquid crystal and a polarization-preserving anisotropic mirror conjugated to a metasurface. The difference of the proposed structure from a fully dielectric one is that the metasurface makes it possible to decrease the number of layers of a polarization-preserving anisotropic mirror by a factor of more than two at the retained Q-factor of the localized state. It is shown that the proposed structure can be used in a vertically emitting laser.

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Держатели документа:
RAS, Fed Res Ctr KSC, Kirensky Inst Phys, SB, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Natl Yang Ming Chiao Tung Univ, Inst Imaging & Biomed Photon, Coll Photon, 301 Sec 2,Gaofa 3rd Rd, Tainan 711010, Taiwan.

Доп.точки доступа:
Rudakova, N. V.; Рудакова, Наталья Викторовна; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Pankin, P. S.; Панкин, Павел Сергеевич; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Chen, Kuo-Ping; Lee, Wei; RFBRRussian Foundation for Basic Research (RFBR); MOST [19-52-52006]; Higher Education Sprout Project of the National Yang Ming Chiao Tung University; Ministry of Science and Technology (MOST)Ministry of Science and Technology, China [108-2923-E-009-003-MY3]
}
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Val'kov, V. V.
Splitting of the spectrum of fermionic excitations in a topological insulator by charge fluctuations / V. V. Val'kov // JETP Letters. - 2021. - Vol. 114, Is. 12. - P. 751-756, DOI 10.1134/S0021364021240097. - Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (project no. 19-02-00348) . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
HUBBARD FERMIONS
   EDGE STATES
   PHASE
   SURFACE
Аннотация: It is shown that the intersite Coulomb interaction of electrons in a topological insulator leads to the splitting of the initial energy structure and to the induction of two bands of fluctuation states. As a result, the total spectrum of Fermi excitations of the topological insulator has a four-band structure. The dielectric gap is determined by the energy interval between the bottom of the band of fluctuation states of conduction electrons and the top of the valence band of fluctuation states. Since the band of fluctuation states is narrow, quasiparticles with different effective masses appear.

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Публикация на русском языке Вальков, Валерий Владимирович. Расщепление спектра фермиевских возбуждений топологического изолятора зарядовыми флуктуациями [Текст] / В. В. Вальков // Письма в ЖЭТФ. - 2021. - Т. 114 Вып. 12. - С. 812-817

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Вальков, Валерий Владимирович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-02-00348]
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Model of a tunable hybrid Tamm mode-liquid crystal device / M. V. Pyatnov, R. G. Bikbaev, I. V. Timofeev, S. Y. Vetrov // Appl. Optics. - 2020. - Vol. 59, Is. 21. - P. 6347-6351, DOI 10.1364/AO.395901. - Cited References: 37. - Russian Foundation for Basic Research (19-52-52006) . - ISSN 1559-128X. - ISSN 2155-3165

РУБ Optics
Рубрики:
PLASMON
   PHASE
   SENSOR
   STATES
Аннотация: A concept of an easily tunable device based on hybrid Tamm modes is proposed. The device can be controlled using a high-sensitivity chiral liquid crystal serving as a mirror. The coupling of the chiral optical Tamm state with the Tamm plasmons is predicted. The Tamm plasmons are excited at different frequencies for the orthogonal linear polarizations, while the chiral Tamm state is excited at only one frequency. The properties of the proposed model are analytically and numerically calculated. The possibility of creating a two- and three-mode laser with tunable characteristics on the basis of the proposed model is discussed.

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Держатели документа:
Russian Acad Sci, Fed Res Ctr, Kirensky Inst Phys, Siberian Branch,Krasnoyarsk Sci Ctr, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Pyatnov, M. V.; Пятнов, Максим Владимирович; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Timofeev, I. V.; Тимофеев, Иван Владимирович; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-52-52006]
}
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CoPt-Al2O3 nanocomposite films: synthesis, structure, and magnetic properties / V. S. Zhigalov, L. E. Bykova, V. G. Myagkov [et al.] // J. Surf. Ingestig. - 2020. - Vol. 14, Is. 1. - P. 47-53, DOI 10.1134/S102745102001022X. - Cited References: 29. - This study was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects no. 18-42-243009 r_mol_a and no. 19-43-240003 r_a, and the Foundation for Assistance to Small Innovative Enterprises in Science and Technology, contract no. 11843GU/2017, code 0033636, U.M.N.I.K. competition. . - ISSN 1027-4510. - ISSN 1819-7094

РУБ Physics, Condensed Matter
Рубрики:
SOLID-STATE SYNTHESIS
   GRANULAR THIN-FILMS
   THERMITE SYNTHESIS
   PHASE
Кл.слова (ненормированные):
thin films -- ferromagnetic nanocomposites -- CoPt alloy -- magnetic anisotropy
Аннотация: The structure and magnetic properties of CoPt–Al2O3 nanocomposite films synthesized by the annealing of Al/(Co3O4 + Pt) bilayers on a MgO(001) substrate at 650°C in vacuum are investigated. The synthesized composite films contain ferromagnetic CoPt grains with an average size of 25–45 nm enclosed in a nonconducting Al2O3 matrix. The saturation magnetization (Ms ~ 330 G) and coercivity (Hc ≈ 6 kOe) of the films are measured in the film plane and perpendicular to it. The obtained films are characterized by a spatial rotational magnetic anisotropy, which makes it possible to arbitrarily set the easy magnetization axis in the film plane or perpendicular to it using a magnetic field stronger than the coercivity (H ˃ Hc).

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Публикация на русском языке Нанокомпозитные пленки CoPt–Al2O3: синтез, структурные и магнитные свойства [Текст] / В. С. Жигалов, Л. Е. Быкова, В. Г. Мягков [и др.] // Поверхность. - 2020. - № 1. - С. 60-67

Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Zhigalov, V. S.; Жигалов, Виктор Степанович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Myagkov, V. G.; Мягков, Виктор Григорьевич; Pavlova, A. N.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Matsynin, A. A.; Мацынин, Алексей Александрович; Patrin, G. S.; Патрин, Геннадий Семёнович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [18-42-243009 r_mol_a, 19-43-240003 r_a]; Foundation for Assistance to Small Innovative Enterprises in Science and Technology [11843GU/2017, 0033636]
}
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X-ray transient absorption spectroscopy by an ultrashort x-ray-laser pulse in a continuous-wave IR field / X. Shi, Y. Wu, J. G. Wang [et al.] // Phys. Rev. A. - 2020. - Vol. 101, Is. 2. - Ст. 023401, DOI 10.1103/PhysRevA.101.023401. - Cited References: 56. - Grants from the National Basic Research Program of China (Grant No. 2017YFA0403200), National Natural Science Foundation of China (Grants No. 11604197, No. 11934004, and No. 11974230), the Science Challenge Program of China (Grants No. TZ2018005 and No. TZ2016005), and the Organization Department of CCCPC are acknowledged. V.K. acknowledges financial support from Swedish Research Council within the State Contract of the Ministry of Education and Science of the Russian Federation for Siberian Federal University for Scientific Research in 2017-2019 (Project No. 3.2662.2017) . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
MOLECULAR NITROGEN
   TIME
   DYNAMICS
   PHASE
   SPECTRA
   DECAY
Аннотация: X-ray transient absorption spectra (XTAS) of molecules are theoretically investigated in a femtosecond x-ray pump and continuous-wave (cw) infrared (IR)-control scenario. The scheme is exemplified by a CO molecule resonantly pumped into carbon and oxygen core-excited 1s→π∗ states by a weak femtosecond x-ray pulse, while dynamic Stark shifts are induced by the cw IR-control radiation. As a result, significant shoulder structures appear in XTAS showing strong dependence on the phase of IR radiation relative to the envelope of the x-ray pulse. Due to a significant difference in the frequencies of the two pulses, the present XTAS scheme provides much clear interpretation of the dynamic Stark effects as compared to the attosecond UV transient absorption scenario. Within the suggested two-level model, where the total spectrum is decomposed as incoherent superposition of contributions from different vibrational excitations weighted by the Franck-Condon Factors, all spectral structures can be well identified and interpreted in a good agreement with the full-scale molecular simulations. Well-characterized XTAS in the proposed IR-control scheme can be applied for fine phase synchronization between IR and x-ray pulses, highly demanded in modern experiments on x-ray free-electron lasers.

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Держатели документа:
Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Peoples R China.
Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China.
Peking Univ, Ctr Appl Phys & Technol, Beijing 100084, Peoples R China.
Royal Inst Technol, Theoret Chem & Biol, S-10691 Stockholm, Sweden.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Shi, Xin; Wu, Yong; Wang, Jian Guo; Kimberg, V.; Кимберг, Виктор Валерьевич; Zhang, Song Bin
}
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Chiral optical Tamm states at the interface between a Dye-doped cholesteric liquid crystal and an anisotropic mirror / A. Yu. Avdeeva, S. Ya. Vetrov, R. G. Bikbaev [et al.] // Materials. - 2020. - Vol. 13, Is. 15. - Ст. 3255, DOI 10.3390/ma13153255. - Cited References: 44. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 19-42-240004 and by Russian Foundation for Basic Research, project No. 19-52-52006 . - ISSN 1996-1944

РУБ Materials Science, Multidisciplinary
Рубрики:
PHASE
POLARIZATION
MODES
Кл.слова (ненормированные):
localization of light -- photonic crystals -- chirality -- dye-doped cholesteric liquid crystal -- optical Tamm states -- resonant frequency dispersion
Аннотация: The resonant splitting of optical Tamm state numerically is demonstrated. The Tamm state is localized at the interface between a resonant chiral medium and a polarization-preserving anisotropic mirror. The chiral medium is considered as a cholesteric liquid crystal doped with resonant dye molecules. The article shows that the splitting occurs when dye resonance frequency coincides with the frequency of the Tamm state. In this case the reflectance, transmittance, and absorptance spectra show two distinct Tamm modes. For both modes, the field localization is at the interface between the media. The external field control of configurable optical and structural parameters paves the way for use in tunable chiral microlaser.

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Публикация в сборнике Soft photonic crystals and metamaterials [Текст] / ed., pref.: I. V. Timofeev, W. Lee, 2022. - VII с. ; 127 с. (Введено оглавление)

Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Avdeeva, A. Yu.; Авдеева, Анастасия Юрьевна; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Pyatnov, M. V.; Пятнов, Максим Владимирович; Rudakova, N. V.; Рудакова, Наталья Викторовна; Timofeev, I. V.; Тимофеев, Иван Владимирович; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [19-42-240004]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-52-52006]
}
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    Magnetic and structure properties of CoPt-In2O3 nanocomposite films / L. E. Bykova, V. G. Myagkov, V. S. Zhigalov [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2020. - Vol. 13, Is. 4. - P. 431-438 ; Журн. СФУ. Матем. и физика, DOI 10.17516/1997-1397-2020-13-4-431-438. - Cited References: 29. - This study was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects no. 19-43-240003 . - ISSN 1997-1397. - ISSN 2313-6022
   Перевод заглавия: Магнитные и структурные свойства нанокомпозитных пленок CoPt-In2O3

РУБ Mathematics
Рубрики:
THIN-FILMS
TEMPERATURE
PHASE
Кл.слова (ненормированные):
thin films -- ferromagnetic nanocomposites -- CoPt alloy -- In2O3 oxide -- тонкие пленки -- ферромагнитные нанокомпозиты -- сплав CoPt -- оксид In2O3
Аннотация: The structural and magnetic properties of CoPt-In2O3 nanocomposite films formed by vacuum annealing of the In/(Co3O4 + Pt)/MgO film system in the temperature range of 100–800 °C have been investigated. The synthesized nanocomposite films contain ferromagnetic CoPt grains with an average size of 5nm enclosed in an In2O3 matrix, and have a magnetization of 600 emu/cm3, and a coercivity of 150 Oe at room temperature. The initiation 200 °C and finishing 800 °C temperatures of synthesis were determined, as well as the change in the phase composition of the In/(Co3O4 + Pt)/MgO film during vacuum annealing.
Исследованы структурные и магнитные свойства нанокомпозитных пленок CoPt- In2O3, полученных вакуумным отжигом пленочной системы In/(Co3O4 + Pt)/MgO в интервале температур 100 – 800 °C. Синтезированные нанокомпозитные пленки содержали ферромагнитные CoPt-кластеры со средним размером 5 nm, заключенные в матрицу In2O3, и имели намагниченность 600 emu/cm3, коэрцитивную силу 150 Oe при комнатной температуре. Определены температуры начала 200 °C и окончания 800 °C синтеза, а также изменение фазового состава пленки In/(Co3O4 + Pt)/MgO при вакуумном отжиге.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Fed Res Ctr KSC SB RAS, Inst Chem & Chem Technol, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Bykova, L. E.; Быкова, Людмила Евгеньевна; Myagkov, V. G.; Мягков, Виктор Григорьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Matsynin, A. A.; Мацынин, Алексей Александрович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bondarenko, G. N.; Patrin, G. S.; Патрин, Геннадий Семёнович; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory [19-43-240003]

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    Val'kov, V. V.
    Edge states of an excitonic insulator with the spin-orbit interaction / V. V. Val'kov // JETP Letters. - 2020. - Vol. 111, Is. 11. - P. 647-652, DOI 10.1134/S0021364020110107. - Cited References: 15. - This work was supported by the Russian Foundation for Basic Research (project no. 19-02-00348) . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
PHASE
   ANOMALIES
Аннотация: The effect of the spin-orbit and Coulomb interactions on the symmetry and topological properties of thes, p, d, ands+dphases of an excitonic insulator has been considered by example of the inverted two-band structure of the HgTe quantum well. It has been found that only thepphase has a nontrivial topology, but it is metastable. It has been shown that the exchange interaction between fermions induces the ground state with thes+dsymmetry of the excitonic order parameter. This phase of the excitonic insulator has zero Chern number; nevertheless, edge states occur in the case of open boundaries.

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Публикация на русском языке Вальков, Валерий Владимирович. Краевые состояния экситонного диэлектрика со спин-орбитальным взаимодействием [Текст] / В. В. Вальков // Письма в ЖЭТФ. - 2020. - Т. 111 Вып. 11. - С. 772-777

Держатели документа:
Russian Acad Sci, Fed Res Ctr KSC, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Вальков, Валерий Владимирович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-02-00348]
}
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In Situ FMR Study of the Selective H2S-Oxidation Stability of ε-Fe2O3/SiO2 Catalysts / S. S. Yakushkin [et al.] // Appl. Magn. Reson. - 2019. - Vol. 50, Is. 5. - P. 725-733, DOI 10.1007/s00723-019-1109-3. - Cited References:32. - This work was supported by the Russian Science Foundation, project no. 17-12-01111. . - ISSN 0937-9347. - ISSN 1613-7507

РУБ Physics, Atomic, Molecular & Chemical + Spectroscopy
Рубрики:
HYDROGEN-SULFIDE
   CALCINATION TEMPERATURE
   OXIDATION
   PHASE
   BED
Аннотация: The stability of a catalyst for partial H2S oxidation has been studied by the ferromagnetic resonance (FMR) technique combined with transmission electron microscopy, X-ray diffraction, Mössbauer spectroscopy, and magnetostatic investigations. The ε-Fe2O3 iron oxide nanoparticles supported on silica have been examined for their stability under the selective H2S oxidation conditions. The combination of the physicochemical methods has been used to study the state of reacted catalysts. The ε-Fe2O3 phase has been found to remain stable under the selective H2S oxidation conditions at temperatures up to 300 °C. The active phase state during the catalytic reaction has been explored using in situ FMR experiments. It has been established that the ε-Fe2O3 nanoparticles retain their structure and magnetic properties in the presence of H2S at high temperatures. During the in situ FMR experiments, the ε-Fe2O3 sulfidation process has been studied.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Lavrentieva 5, Novosibirsk 630090, Russia.
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Yakushkin, S. S.; Bukhtiyarova, G. A.; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Balaev, D. A.; Балаев, Дмитрий Александрович; Martyanov, O. N.; Russian Science Foundation [17-12-01111]
}
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10.

Dzebisashvili, D. M.
London Penetration Depth as a Test of Order Parameter Symmetry in Sodium Cobaltate Superconductors / D. M. Dzebisashvili, A. B. Klyuchantsev // Symmetry-Basel. - 2019. - Vol. 11, Is. 5. - Ст. 633, DOI 10.3390/sym11050633. - Cited References: 43. - The work was financially supported by the Russian Foundation for Basic Research (RFBR) (project no. 18-02-00837) and by the program of the Presidium of the Russian Academy of Sciences No. 12 "Fundamental problems of high-temperature superconductivity". . - ISSN 2073-8994

РУБ Multidisciplinary Sciences
Рубрики:
SPIN
   DEPENDENCE
   POWDER
   CHARGE
   PHASE
   GAP
Кл.слова (ненормированные):
chiral order parameter -- London penetration depth -- sodium cobaltate superconductor
Аннотация: Temperature dependence of the magnetic field penetration depth λ was calculated for water intercalated sodium cobaltate superconductor NaxCoO2⋅yH2O. Assuming that the system is in the chiral d+id–wave superconducting state, it was shown that the shifting of the excitation spectrum nodal points off the normal phase Fermi surface due to variation of the sodium content x changes the functional form of the temperature dependence of λ−2 from exponential to linear in the low temperatures region. It is argued that this change in the functional form of T–dependence of the λ−2 can serve as a proof for the chiral symmetry of the superconducting order parameter in the sodium cobaltate.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Klyuchantsev, Andrey B.; Дзебисашвили, Дмитрий Михайлович; Russian Foundation for Basic Research (RFBR) [18-02-00837]; Presidium of the Russian Academy of Sciences [12]
}
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11.

Magnetodielectric effect in a metamaterial consisting of xerogel with embedded ε-Fe2O3 iron oxide nanoparticles / A. A. Dubrovskiy [et al.] // Solid State Commun. - 2019. - Vol. 289. - P. 27-29, DOI 10.1016/j.ssc.2018.11.020. - Cited References: 30. - This work was supported by the Russian Science Foundation, project no. 17-12-01111. . - ISSN 0038-1098. - ISSN 1879-2766

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
   HIGH-TEMPERATURE
   PHASE
   RAMAN
Аннотация: The ε-Fe2O3 iron oxide is a fairly rare polymorphic modification, which only exists in the form of nanoparticles embedded, as a rule, into a silica gel matrix. This magnetically ordered iron oxide, which exhibits a significant room-temperature coercivity, is a ferroelectric; therefore, the magnetoelectric and magnetodielectric properties of this material evoke keen interest. In this work, we investigate the magnetodielectric (MD) effect in a metamaterial consisting of xerogel SiO2 with embedded ε-Fe2O3 nanoparticles 9 nm in size on average in a concentration of 20 mass.%. This bulk material exhibits the MD effect in a wide temperature range. The temperature behavior of the permittivity is related to the magnetic state of the ε-Fe2O3 oxide, which undergoes the magnetic transition from the magnetically hard to magnetically soft phase in the temperature range of 80–150 K, indicating the interplay of the ε-Fe2O3 magnetic and charge subsystems.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kiresnky Inst Phys, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia.

Доп.точки доступа:
Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Balaev, D. A.; Балаев, Дмитрий Александрович; Krasikov, A. A.; Красиков, Александр Александрович; Yakushhkin, S. S.; Kirillov, V. L.; Martyanov, O. N.; Russian Science Foundation [17-12-01111]
}
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12.

    Mossbauer spectroscopy study of the superparamagnetism of ultrasmall ε-Fe2O3 nanoparticles / Y. V. Knyazev [et al.] // JETP Letters. - 2018. - Vol. 108, Is. 8. - P. 527-531, DOI 10.1134/S0021364018200092. - Cited References: 22. - This work was supported by the Russian Science Foundation (project no. 17-12-01111). . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
High-temperature
   Particles
   ε-Fe2O3
   Phase
   Model
Аннотация: The superparamagnetism of an ensemble of ϵ-Fe2O3 nanoparticles with a mean size of 3.9 nm dispersed in a xerogel SiO2 matrix is studied by the Mössbauer spectroscopy method. It is shown that most nanoparticles at room temperature are in the superparamagnetic (unblocked) state. As the temperature decreases, the progressive blocking of the magnetic moments of the particles occurs, which is manifested in the Mössbauer spectra as the transformation of the quadrupole doublet into a Zeeman sextet. The analysis of the relative intensity of the superparamagnetic (quadrupole doublet) and magnetically split (sextets) spectral components in the range of 4–300 K provides the particle size distribution, which is in agreement with the transmission electron microscopy data. The values of the effective magnetic anisotropy constants (Keff) are determined, and the contribution of surface anisotropy (KS) is estimated for particles of various sizes. It is shown that the quantity Keff is inversely proportional to the particle size, which indicates the significant contribution of the surface to the magnetic state of the ϵ-Fe2O3 nanoparticles with the size of several nanometers.

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Публикация на русском языке Изучение суперпарамагнетизма ультрамалых наночастиц ε-Fe2O3 методом мессбауэровской спектроскопии [Текст] / Ю. В. Князев [и др.] // Письма в ЖЭТФ. - 2018. - Т. 108 № 7-8. - С. 558-562

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Fed Res Ctr KSC, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia.

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Balaev, D. A.; Балаев, Дмитрий Александрович; Kirillov, V. L.; Bayukov, O. A.; Баюков, Олег Артемьевич; Mart'yanov, O. N.; Russian Science Foundation [17-12-01111]
}
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13.

Val'kov, V. V.
Effect of the intersite Coulomb interaction on chiral superconductivity at the noncollinear spin ordering / V. V. Val'kov, A. O. Zlotnikov // Phys. Solid State. - 2017. - Vol. 59, Is. 11. - P. 2120-2126, DOI 10.1134/S1063783417110300. - Cited References:18. - This study was supported by the Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory, and Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, projects no. 16-02-00073-a and 16-42-243057-r-mol-a and the Complex Program of the Siberian Branch of the Russian Academy of Sciences II.2P, project no. 0358-2015-002. A.O. Zlotnikov is grateful for support of the Grant of the President of the Russian Federation SP-1370.2015.5. . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
TRIANGULAR LATTICE
   MAGNETIC ORDER
   COEXISTENCE
   PHASE
Аннотация: We investigate the effect of the intersite Coulomb interaction in a planar system with the triangular lattice on the structure of chiral order parameter Δ(p) in the phase of coexisting superconductivity and noncollinear 120° magnetic ordering. It has been established that the Coulomb correlations in this phase initiate the state where the quasi-momentum dependence Δ(p) can be presented as a superposition of the chiral invariants corresponding to the dx2−y2+idxy and px + ipy symmetry types. It is demonstrated that the inclusion of the Coulomb interaction shifts the Δ(p) nodal point positions and, thereby, changes the conditions for a quantum topological transition.

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Публикация на русском языке Вальков, Валерий Владимирович. Влияние межузельного кулоновского взаимодействия на киральную сверхпроводимость при наличии неколлинеарного спинового упорядочения [Текст] / В. В. Вальков, A. O. Злотников // Физ. тверд. тела. - 2017. - Т. 59 Вып. 11. - С. 2100-2106

Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Zlotnikov, A. O.; Злотников, Антон Олегович; Вальков, Валерий Владимирович; Russian Foundation for Basic Research; Government of the Krasnoyarsk Territory; Krasnoyarsk Territorial Foundation for Support of Scientific and RD Activities [16-02-00073-a, 16-42-243057-r-mol-a]; Complex Program of the Siberian Branch of the Russian Academy of Sciences II.2P [0358-2015-002]; Grant of the President of the Russian Federation [SP-1370.2015.5]
}
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14.

Electron spectroscopy of iron disilicide / A. S. Parshin [et al.] // Tech. Phys. - 2016. - Vol. 61, Is. 9. - P. 1418-1422, DOI 10.1134/S1063784216090176. - Cited References: 33 . - ISSN 1063-7842

РУБ Physics, Applied
Рубрики:
SCATTERING CROSS-SECTIONS
   ENERGY-LOSS SPECTROSCOPY
   QUANTITATIVE-ANALYSIS
   LOSS SPECTRA
   SURFACE
   SI
   HETEROSTRUCTURES
   INTERFACE
   PARAMETER
   PHASE
Аннотация: We have reported on the results of a complex investigation of iron disilicide FeSi2 using characteristic electron energy loss spectroscopy, inelastic electron scattering cross section spectroscopy, and X-ray photoelectron spectroscopy. It has been shown that the main peak in the spectra of inelastic electron scattering for FeSi2 is a superposition of two unresolved peaks, viz., surface and bulk plasmons. An analysis of the fine structure of the spectra of inelastic electron scattering cross section by their decomposition into Lorentzlike Tougaard peaks has made it possible to quantitatively estimate the contributions of individual energy loss processes to the resulting spectrum and determine their origin and energy. © 2016, Pleiades Publishing, Ltd.

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Публикация на русском языке Исследование дисилицида железа методами электронной спектроскопии [Текст] / А. С. Паршин [и др.] // Журн. техн. физ. : Физико-технический институт им. А. Ф. Иоффе РАН, 2016. - Т. 86 Вып. 9. - С. 136–140

Держатели документа:
Rechetnev Siberian State Aerospace University, ul. Krasnoyarskii rabochii 31, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, Russian Federation
Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 13, Novosobirsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodor 50/38, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Parshin, A. S.; Igumenov, A. Y.; Mikhlin, Y. L.; Pchelyakov, O. P.; Zhigalov, V. S.; Жигалов, Виктор Степанович
}
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15.

    Structure evolution and photoluminescence of Lu3(Al,Mg)2(Al,Si)3O12:Ce3+ phosphors: New yellow-color converters for blue LED-driven solid state lighting / H. Ji [et al.] // J. Mater. Chem. C. - 2016. - Vol. 4, Is. 28. - P. 6855-6863, DOI 10.1039/c6tc00966b. - Cited References: 44. - This work was partially supported by the National Natural Science Foundations of China (Grant No. 51511130035, 51272259, 61575182, 51561135015, and 51572232) and the Russian Foundation for Basic Research (Grant No. 15-52-53080). We are also grateful to financial support from the JSPS KAKENHI (No. 15K06448). H. J. thanks the China Scholarship Council (CSC) for scholarship support. V. V. A. was partially supported by the Ministry of Education and Science of the Russian Federation. . - ISSN 2050-7534
   Перевод заглавия: Изменения структуры и фотолюминесценция люминофоров Lu3(Al,Mg)2(Al,Si)3O12:Ce3+: новый желтый преобразователь голубого света, получаемого от твердотельных светодиодов
Рубрики:
WHITE LEDS
   LUMINESCENCE PROPERTIES
   EMITTING-DIODES
   GARNET PHOSPHORS
   SUBSTITUTION
   Ce3+
   PHASE
   Ca
Аннотация: This paper reports the development of new phosphors using the chemical unit cosubstituting solid solution design strategy. Starting from Lu3Al5O12, the Al3+-Al3+ couple in respective octahedral and tetrahedral coordination was simultaneously substituted by a Mg2+-Si4+ pair forming the Lu3(Al2-xMgx)(Al3-xSix)O12:Ce3+ (x = 0.5-2.0) series; as a result, the CeO8 polyhedrons were compressed and the emission got red-shifted from green to yellow together with the broadening. The evolution of, the unit cell, the local structural geometry as well as the optical properties of Ce3+ in these garnet creations, in response to the gradual Mg-Si substitution for Al-Al, were studied by combined techniques of structural refinement and luminescence measurements. The new composition Lu2.97Ce0.03Mg0.5Al4Si0.5O12 was comprehensively evaluated regarding its potential application in blue LED-driven solid state white lighting: the maximum emission is at 550 nm under ?ex = 450 nm; the internal and external quantum efficiencies can reach 85% and 49%, respectively; a 1-phosphor-converted wLED lamp fabricated using the as-prepared phosphor exhibits the luminous efficacy of 105 lm W-1, the correlated color temperature of 6164 K and the color rendering index (Ra) of 75.6. The new solid solution composition series is open for further optimization to enhance the competence for commercial consideration. © 2016 The Royal Society of Chemistry.

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Держатели документа:
National Laboratory of Mineral Materials, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing, China
Sialon Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan
College of Optical and Electronic Technology, China Jiliang University, Hangzhou, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
College of Materials, Xiamen University, Xiamen, China
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, Russian Federation

Доп.точки доступа:
Ji, H.; Wang, L.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Hirosaki, N.; Xie, R.; Huang, Z.; Xia, Z.; Ten Kate, O. M.; Liu, L.; Atuchin, V. V.
}
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16.

    Gorelik, V. S.
    Raman light scattering in sodium nitrite crystals / V. S. Gorelik, A. Y. Pyatyshev, A. S. Krylov // Bull. Lebedev Phys. Inst. - 2016. - Vol. 43, Is. 5. - P. 167-173, DOI 10.3103/S1068335616050043. - Cited References:37. - This study was supported by the Russian Foundation for Basic Research, projects nos. 12-02-00491, 13-02-00449,13-02-90420, 14-02-00190. . - ISSN 1068-3356. - ISSN 1934-838X
Рубрики:
NANO2
   PHASE
   SPECTROSCOPY
   PARAPHOTONS
   DEPENDENCE
   SPECTRUM
   SEARCH
Кл.слова (ненормированные):
sodium nitrite -- Raman scattering -- spectrum -- polar mode -- polariton -- ferroelectric -- dispersion curves
Аннотация: Raman light scattering spectra of a ferroelectric sodium nitrite crystal is studied in the lattice mode region as the temperature is lowered from room temperature to 123 K. The existence of a Raman satellite corresponding to the soft lattice mode, i.e., transverse polar vibration responsible for the ferroelectric phase transition, is established for the first time. It is found that the intensity of the Raman scattering by the pseudo-scalar low-frequency A (2) mode exceeds the intensity of other lattice variations by an order of magnitude.

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Публикация на русском языке Горелик, Владимир Семенович. Комбинационное рассеяние света в кристаллах нитрита натрия [Текст] / В. С. Горелик, А. Ю. Пятышев, А. С. Крылов // Кратк. сообщ. по физ. : Физический институт им. П. Н. Лебедева РАН, 2016. - Т. 43 № 5. - С. 26-36

Держатели документа:
Russian Acad Sci, PN Lebedev Phys Inst, Leninskii Pr 53, Moscow 119991, Russia.

Доп.точки доступа:
Pyatyshev, A. Yu.; Krylov, A. S.; Крылов, Александр Сергеевич; Russian Foundation for Basic Research [12-02-00491, 13-02-00449, 13-02-90420, 14-02-00190]
}
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17.

Study of the high-coercivity material based on ε-Fe2O3 nanoparticles in the silica gel matrix / D. A. Balaev [et al.] // Tech. Phys. Lett. - 2016. - Vol. 42, Is. 4. - P. 347-350, DOI 10.1134/S1063785016040039. - Cited References: 17. - This study was supported by the Federal Agency for Scientific Organizations of Russia (base budget financing no. V.44.1.15), the Scientific and Educational Center of Energy-Efficient Catalysis at the Novosibirsk State University, and the Russian Foundation for Basic Research (project no. 15-32-50919). . - ISSN 1063-7850

РУБ Physics, Applied
Рубрики:
Phase
   Field
   State
   Oxide
   Iron
Аннотация: We report the results of investigations of ε-Fe2O3 magnetic nanoparticles obtained by incipient wetness impregnation of silica gel. It was established that the obtained samples with an iron content of 12‒16% mass % containing ε-Fe2O3 nanoparticles with an average size of 10 nm on the silica gel surface exhibit a room-temperature coercivity of about 10 kOe. Along with fabrication simplicity, this fact makes the prepared samples promising for application as a magnetically hard material. © 2016, Pleiades Publishing, Ltd

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Публикация на русском языке Исследование высококоэрцитивного материала на основе наночастиц ε-Fe2O3 в матрице силикагеля [Текст] / Д. А. Балаев [и др.] // Письма в Журн. технич. физ. : Санкт-Петербургская издательско-книготорговая фирма "Наука", 2016. - Т. 42 Вып. 7. - С. 23-30

Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Boreskov Institute of Catalysis, Russian Academy of Sciences, Siberian Branch, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
International Laboratory of High Magnetic Fields and Low Temperatures, Wroclaw, Poland

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Yakushkin, S. S.; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Bukhtiyarova, G. A.; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Martyanov, O. N.
}
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18.

    Synthesis and magnetic properties of [(CoP)soft/NiP/(CoP)hard/NiP]n films / G. S. Patrin [et al.] // J. Low Temp. Phys. - 2016. - Vol. 182, Is. 3-4. - P. 73-81, DOI 10.1007/s10909-015-1363-1. - Cited References: 25. - This study was supported by the Ministry of Education and Science of the Russian Federation for the Siberian Federal University, state Order No. 3.2534.2014/K and the Russian Foundation for Basic Research, Project No. 14-02-00238-a. . - ISSN 0022-2291
   Перевод заглавия: Синтез и магнитные свойства пленок [(CoP)soft/NiP/(CoP)hard/NiP]n

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
Exchange
Phase
Model
Кл.слова (ненормированные):
Interlayer coupling -- Magnetic heterostructure -- Hysteresis loop -- Interlayer coupling -- Magnetic spring
Аннотация: Magnetic interactions in Co–Ni–P multilayers consisting of alternating magnetically soft and magnetically hard layers are experimentally investigated. The variation in the shape of magnetization loops at the conjugation of magnetically soft and magnetically hard layers and the saturation field oscillations with varying number of layer pairs are established. It is demonstrated that insertion of a nonmagnetic spacer significantly affects the magnetization reversal in the structure. It is concluded that in studying the interlayer coupling it is necessary to take into account the biquadratic interaction.

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Держатели документа:
L.V. Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Prospect Svobodny, 79, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Patrin, G. S.; Патрин, Геннадий Семёнович; Shiyan, Ya. G.; Шиян, Ярослав Германович; Patrin, K. G.; Патрин, Константин Геннадьевич; Yurkin, G. Yu.; Юркин, Глеб Юрьевич
}
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19.

    Crystal structure and luminescence properties of green-emitting Sr1−xAl12O19:xEu2+ phosphors / B. Ma [et al.] // Ceram. Int. - 2016. - Vol. 42, Is. 5. - P. 5995-5999, DOI 10.1016/j.ceramint.2015.12.149. - Cited References: 30. - This work was supported by the National Natural Science Foundation of China (Grant nos. 51032007 and 51372232) and the Fundamental Research Funds for the Central Universities (Grant no. 2652015024). . - ISSN 0272-8842. - ISSN 1873-3956
   Перевод заглавия: Кристаллическая структура и люминесцентные свойства зеленого люминофора Sr1-xAl12O19:xEu2+

РУБ Materials Science, Ceramics
Рубрики:
COLOR-TUNABLE PHOSPHOR
   ENERGY-TRANSFER
   Dy3+ PHOSPHORS
   NEAR-UV
   Eu2+
   DIODES
   PHASE
   STATE
   Ce3+
Кл.слова (ненормированные):
Crystal structure -- Magnetoplumbite -- Phosphor
Аннотация: In this paper, a series of novel luminescent Sr1−xAl12O19:xEu2+ phosphors were synthesized by a high temperature solid-state reaction. The phase structure, photoluminescence (PL) properties, as well as the decay curves were investigated. The quenching concentration of Eu2+ in SrAl12O19 was about 0.15 (mol). Upon excitation at 378 nm, the composition-optimized Sr0.85Al12O19:0.15Eu2+ exhibited strong broad-band green emission at 530 nm with the CIE chromaticity (0.2917, 0.5736). The results indicate that Sr1−xAl12O19:xEu2+ phosphors have potential applications as green-emitting phosphors for UV-pumped white-light LEDs.

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Держатели документа:
China Univ Geosci, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Natl Lab Mineral Mat, Beijing 100083, Peoples R China.
SB RAS, Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.

Доп.точки доступа:
Ma, Bin; Guo, Q. F.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lv, Zhenfei; Yao, Jun; Mei, Lefu; Huang, Zhaohui
}
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20.

Kuz’min, V. I.
Influence of varying magnetic order in an external magnetic field on the electronic structure and Fermi surface within the t–J model / V. I. Kuz’min, S. V. Nikolaev, S. G. Ovchinnikov // JETP Letters. - 2016. - Vol. 103, Is. 2. - P. 125-130, DOI 10.1134/S0021364016020089. - Cited References: 46. - This work was supported by the Russian Science Foundation (project no. 14-12-00061). . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
C copper oxides
   Quantum oscillations
   Cuprate superconductors
   Hubbard-model
   Temperature
   Excitations
   YBa2Cu3OY
   Evolution
   Phase
Аннотация: We investigate the electronic structure of the two-dimensional t–J model in a transverse external static magnetic field with canted long-range magnetic order using cluster perturbation theory. The distribution of the spectral weight in the whole range of fields from zero to ferromagnetic saturation is explored. We demonstrate the possibility of a sharp change in a distribution of spectral weight at the Fermi level associated with the magnetic correlations when varying magnetic field.

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Публикация "на русском языке" Kuz’min V. I. Influence of varying magnetic order in an external magnetic field on the electronic structure and Fermi surface within the t–J model [Текст] / V. I. Kuz’min, S. V. Nikolaev, S. G. Ovchinnikov // Письма в Журн. эксперим. и теор. физ. : Наука, 2016. - Т. 103 Вып. 1-2. - С. 132-137

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe sh. 31, Moscow, Russian Federation

Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Кузьмин, Валерий Ипполитович
}
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