Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>A=Orlov, Y. S.$<.>)

Общее количество найденных документов : 4
Показаны документы с 1 по 4

Ovchinnikov, S. G.
Magnetoresistance of LaCoO3 and an insulator-metal transition induced in it by a high magnetic field / S. G. Ovchinnikov, Y. S. Orlov // JETP Letters. - 2011. - Vol. 92, Is. 9. - P. 613-617, DOI 10.1134/S0021364010210095. - Cited References: 13. - This work was supported by the Division of Physical Sciences, Russian Academy of Sciences (program no. 2.3); by the Siberian and Ural Branches, Russian Academy of Sciences (joint project no. 40); by the Ministry of Education and Science of the Russian Federation (state contract no. P891, federal program "Scientific and Pedagogical Personnel of Innovative Russia"); by the Russian Foundation for Basic Research (project nos. 09-02-00171 and 10-02-00251); and by the Dynasty Foundation. . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
SPIN-STATE
Аннотация: The transformation of the band structure of LaCoO3 in the applied magnetic field has been theoretically studied. If the field is below its critical value B (C) a parts per thousand 65 T, the dielectric band gap decreases with the field, thus giving rise to negative magnetoresistance that is highest at T a parts per thousand integral 300-500 K. The critical field is related to the crossover between the low- and high-spin terms of Co3+ ions. The spin crossover results in an insulator-metal transition induced by an increase in the magnetic field.

WOS,
Scopus,
Читать в сети ИФ

Держатели документа:
[Ovchinnikov, S. G.
Orlov, Yu. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Ovchinnikov, S. G.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk 660041, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Orlov, Y. S.; Овчинников, Сергей Геннадьевич
}
Найти похожие

Electronic structure, magnetic properties, and mechanism of the insulator-metal transition in LaCoO3 taking into account strong electron correlations / S. G. Ovchinnikov [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 1. - P. 140-151, DOI 10.1134/S1063776110061159. - Cited References: 36. - This study was supported financially by the Siberian and Ural Branches of the Russian Academy of Sciences (Integration Project no. 40), Department of Physics of the Russian Academy of Sciences (Program 2.3), Russian Foundation for Basic Research (Project nos. 09-02-00171-a and 10-02-00251), and Noncommercial "Dynasty" Foundation. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SPIN-STATE TRANSITION
CHARGE
Кл.слова (ненормированные):
Energy spectra -- Excited energy level -- Finite temperatures -- Gap state -- Gap widths -- High temperature -- High-temperature anomalies -- Insulator metal transition -- Pauli contribution -- Spin crossovers -- Strong electron correlations -- Temperature dependence -- Total magnetization -- Cobalt compounds -- Density functional theory -- Electron correlations -- Electron density measurement -- Electronic properties -- Electronic structure -- Magnetic susceptibility -- Semiconductor insulator boundaries -- Spectroscopy -- Metal insulator transition
Аннотация: The electronic structure of LaCoO3 at finite temperatures is calculated using the LDA+GTB method taking into account strong electron correlations and possible spin crossover upon an increase in temperature. Gap states revealed in the energy spectrum of LaCoO3 reduce the dielectric gap width upon heating; this allowed us to describe the insulator-metal transition observed in this compound at T = 500-600 K. The temperature dependence of the magnetic susceptibility with a peak at T a parts per thousand 100 K is explained by the Curie contribution from thermally excited energy levels of the Co3+ ion. At high temperatures, the Pauli contribution from a band electron is added and the total magnetization of LaCoO3 is considered as the sum M (tot) = M (loc) + M (band). The second term describes the band contribution appearing as a result of the insulator-metal transition and facilitating the emergence of a high-temperature anomaly in the magnetic susceptibility of LaCoO3.

WOS,
Scopus,
РИНЦ,
Смотреть статью,
Читать в сети ИФ

Публикация на русском языке Электронная структура, магнитные свойства и механизм перехода диэлектрик-металл в LaCoO[3] с учетом сильных электронных корреляций [Текст] / С. Г. Овчинников [и др.] // Журнал экспериментальной и теоретической физики. - 2011. - Т. 139 Вып. 1. - С. 162-174

Держатели документа:
[Ovchinnikov, S. G.
Orlov, Yu S.] Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Ovchinnikov, S. G.] Siberian Aerosp Univ, Krasnoyarsk 660014, Russia
[Nekrasov, I. A.] Russian Acad Sci, Ural Div, Inst Electrophys, Ekaterinburg 620016, Russia
[Pchelkina, Z. V.] Russian Acad Sci, Ural Div, Inst Met Phys, Ekaterinburg 620990, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Siberian Aerospace University, Krasnoyarsk 660014, Russian Federation
Institute of Electrophysics, Ural Division, Russian Academy of Sciences, Yekaterinburg 620016, Russian Federation
Institute of Metal Physics, Ural Division, Russian Academy of Sciences, Yekaterinburg 620990, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Orlov, Y. S.; Nekrasov, I. A.; Pchelkina, Z. V.
}
Найти похожие

Novel pressure-induced magnetic transition in magnetite (Fe(3)O(4)) / Y. . Ding [et al.] // Phys. Rev. Lett. - 2008. - Vol. 100, Is. 4. - Ст. 45508, DOI 10.1103/PhysRevLett.100.045508. - Cited References: 39 . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
MULTIPLE-SCATTERING THEORY
   X-RAY DICHROISM
   LOWER MANTLE
   VERWEY TRANSITION
   K-EDGE
   CIRCULAR-DICHROISM
   SPIN TRANSITION
   BAND-STRUCTURE
   IRON
   FE
Кл.слова (ненормированные):
Emission spectroscopy -- Magnetoelectronics -- Pressure effects -- Synchrotron radiation -- Diamond anvil cell -- Magnetic transition -- X-ray magnetic circular dichroism -- Magnetite
Аннотация: Fe K-edge x-ray magnetic circular dichroism of magnetite (Fe(3)O(4)) powders was measured with synchrotron radiation under variable pressure and temperature conditions in diamond anvil cell. The magnetic dichroism was observed to decrease discontinuously by similar to 50% between 12 and 16 GPa, independent of temperature. The magnetic transition is attributed to a high-spin to intermediate-spin transition of Fe(2+) ions in the octahedral sites and could account for previously observed structural and electrical anomalies in magnetite at this pressure range. The interpretation of x-ray magnetic circular dichroism data is supported by x-ray emission spectroscopy and theoretical cluster calculations.

WOS,
Scopus,
Читать в сети ИФ
Держатели документа:
Mao, Ho-kwang] Carnegie Inst Washington, HPSynC, Argonne, IL 60439 USA
Lang, Jonathan C.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
[Ovchinnikov, Sergei G.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Orlov, Yuri S.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Mao, Ho-kwang] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA
[Mao, Ho-kwang] Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA
HPSynC, Carnegie Institution of Washington, 9700 South Cass Avenue, Argonne, IL 60439, United States
Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Science, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC 20015, United States
HPCAT, Carnegie Institution of Washington, Building 434E, 9700 South Cass Avenue, Argonne, IL 60439, United States

Доп.точки доступа:
Ding, Y.; Haskel, D.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Tseng, Y. C.; Orlov, Y. S.; Lang, J. C.; Mao, H. K.
}
Найти похожие

Orlov, Y. S.
Construction of a Multielectron Basis for Mott Insulators with Strong Electron Correlations, Spin-Orbit Interaction, and Covalence / Y. S. Orlov, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2009. - Vol. 109, Is. 2. - P. 322-338, DOI 10.1134/S1063776109080196. - Cited References: 35 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
NARROW ENERGY BANDS
   MAGNETIC ANISOTROPY ENERGY
   ORIGIN
   TRANSITION
   PHYSICS
   MANGANITES
   OXIDES
   CHARGE
Аннотация: We propose that the apparatus of quantum mechanics of a free atom (in particular, the theory of nj symbols and Rakah-Wigner genealogic coefficients generalized to the case of point groups and widely used in crystal field theory) be used for constructing multielectron bases with allowance for covalence and spin-orbit interaction. This allows us to take into account the electron-electron interaction for 3d ions the most comprehensively. The basis constructed in this way can be used in the generalized strong coupling method for the multiband p-d model in describing the structure of the quasiparticle energy spectrum and physical properties of systems with strong electron correlations. The procedure of construction and computation is demonstrated for the (5)T(2g) term in the d(6) configuration of the transition metal atom in an octahedral field. The mechanism for the emergence of magnetic anisotropy in S ions (Fe(3+) and Mn(2+)) due to covalent mixing of d(6) (L) under bar configurations with a nonzero orbital angular momentum ((L) under bar is a hole in ligands) is demonstrated

WOS,
Смотреть статью,
Читать в сети ИФ

Публикация на русском языке Орлов, Юрий Сергеевич. Построение многоэлектронного базиса для моттовских диэлектриков с учетом сильных электронных корреляций, спин-орбитального взаимодействия и ковалентности [Текст] / Ю. С. Орлов, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 2009. - Т. 136 Вып. 2. - С. 377-392

Держатели документа:
[Orlov, Yu S.
Ovchinnikov, S. G.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
Найти похожие