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Nesterov, A. I.
Quench dynamics in spin crossover induced by high pressure / A. I. Nesterov, S. G. Ovchinnikov, G. A. Iaroshenko // Cent. Eur. J. Phys. - 2013. - Vol. 11, Is. 7. - P. 894-903, DOI 10.2478/s11534-013-0273-6. - Art. in press . - ISSN 1895-1082
Кл.слова (ненормированные):
energy level crossing -- quantum phase transition -- spin crossover
Аннотация: In this paper we have analytically and numerically studied the dynamics of spin crossover induced by time-dependent pressure. We show that quasi static pressure, with a slow dependence on time, yields a spin crossover leading to transition from the high spin (HS) quantum system state to the low spin (LS) state. However, quench dynamics under shockwave load are more complicated. The final state of the system depends on the amplitude and pulse velocity, resulting in the mixture of the HS and LS states. В© 2013 Versita Warsaw and Springer-Verlag Wien.

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Держатели документа:
Univ Guadalajara, CUCEI, Guadalajara 44420, Jalisco, Mexico
SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engeniering Phys & Radioelect, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Iaroshenko, G. A.; Ярошенко, Григорий Александрович
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Nesterov, A. I.
Geometric phases and quantum phase transitions in open systems / A. I. Nesterov, S. G. Ovchinnikov // Phys. Rev. E. - 2008. - Vol. 78, Is. 1. - Ст. 15202, DOI 10.1103/PhysRevE.78.015202. - Cited References: 29 . - ISSN 1539-3755

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
POINTS
DEGENERACIES
Кл.слова (ненормированные):
Chlorine compounds -- Electron tunneling -- Ferromagnetism -- Ising model -- Magnetic fields -- Magnetism -- Open systems -- Quantum electronics -- Quantum optics -- Sedimentation -- Effective Hamiltonian -- Eigenvalues -- First orders -- Geometric phase -- Geometric phases -- Ground-state -- Hermitian -- One-dimensional -- Open quantum systems -- Quantum phase transition -- Quantum phase transitions -- Transverse-magnetic fields -- Phase transitions
Аннотация: The relationship is established between quantum phase transitions and complex geometric phases for open quantum systems governed by a non-Hermitian effective Hamiltonian with accidental crossing of the eigenvalues. In particular, the geometric phase associated with the ground state of the one-dimensional dissipative Ising model in a transverse magnetic field is evaluated, and it is demonstrated that the related quantum phase transition is of the first order.

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Держатели документа:
[Nesterov, Alexander I.] Univ Guadalajara, CUCEI, Dept Fis, Guadalajara 44420, Jalisco, Mexico
[Ovchinnikov, S. G.] SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Departamento de Fisica, CUCEI, Universidad de Guadalajara, Av. Revolucion 1500, Guadalajara, Codigo Postal 44420, Jalisco, Mexico
L. V. Kirensky Institute of Physics, SB, RAS, 660036 Krasnoyarsk, Russian Federation
Siberian Federal University, 660041, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Nesterov, A. I.
Magnetic monopoles with generalized quantization condition / A. I. Nesterov, F. A. de la Cruz // Phys. Lett. A. - 2002. - Vol. 302, Is. 5-6. - P. 253-260, DOI 10.1016/S0375-9601(02)01172-6. - Cited References: 33 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
QUANTUM-MECHANICS
   DIRAC MONOPOLE
   3-COCYCLE
   SPACE
Кл.слова (ненормированные):
monopole -- nonunitary representations -- nonassociativity -- gauge loop -- quasigroups -- Gauge loop -- Monopole -- Nonassociativity -- Nonunitary representations -- Quasigroups -- article -- calculation -- magnetic field -- mathematics -- quantum mechanics -- rotation -- theory
Аннотация: Theory of pointlike magnetic monopole with an arbitrary magnetic charge is considered. It is shown that a proper description requires making use of nonunitary representations of the rotation group and the nonassociative generalization of the gauge group and fibre bundle theory. (C) 2002 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Univ Guadalajara, Dept Fis, CUCEI, Guadalajara 44420, Jalisco, Mexico
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Guanajuato, Inst Fis, Guanajuato, Mexico
ИФ СО РАН
Departamento de Fisica, CUCEI, Universidad de Guadalajara, Av. Revolucion 1500, Guadalajara, CP 44420, Jalisco, Mexico
L.V. Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Instituto de Fisica, Universidad de Guanajuato, Leon, Guanajuato, Mexico

Доп.точки доступа:
de la Cruz, F. A.
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Grachev, A. V.
The gauge-theory of point-defects / A. V. Grachev, A. I. Nesterov, S. G. Ovchinnikov // Phys. Status Solidi B. - 1989. - Vol. 156, Is. 2. - P. 403-410, DOI 10.1002/pssb.2221560203. - Cited References: 22 . - ISSN 0370-1972

РУБ Physics, Condensed Matter

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Доп.точки доступа:
Nesterov, A. I.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Nesterov, A. I.
Spin crossover: the quantum phase transition induced by high pressure / A. I. Nesterov, S. G. Ovchinnikov // JETP Letters. - 2009. - Vol. 90, Is. 7. - P. 530-534, DOI 10.1134/S0021364009190072. - Cited References: 28 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
GEOMETRIC PHASES
POINTS
Аннотация: The relationship is established between the Berry phase and spin crossover in condensed matter physics induced by high pressure. It is shown that the geometric phase has topological origin and can be considered as the order parameter for such transition.

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Держатели документа:
[Nesterov, A. I.] Univ Guadalajara, CUCEI, Guadalajara 44430, Jalisco, Mexico
[Ovchinnikov, S. G.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660062, Russia
ИФ СО РАН
CUCEI, Universidad de Guadalajara, Guadalajara, Mexico
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, 660062, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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NESTEROV, A. I.
ACOUSTIC-WAVE AMPLIFICATION IN FAST CRYSTALLIZATION / A. I. NESTEROV, S. G. OVCHINNIKOV // Fiz. Tverd. Tela. - 1988. - Vol. 30, Is. 1. - P. 184-186. - Cited References: 14 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Nesterov, A. I.
Effect of interatomic interactions on the spin crossover under high pressure / A. I. Nesterov, S. G. Ovchinnikov, Yu. S. Orlov // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P1.49. - P. 114. - References: 4. - This work has been supported by the RAS program, the state task 0358-2015-0006, RFBR Grant no. 16-02-00507 and Scholarship of the President of the Russian Federation СП-1844.2016.1 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
spin crossover -- quantum phase transition -- high pressure

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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Cooperative phenomena in spin crossover systems / A. I. Nesterov [et al.]. - Electronic text data // ArXiv. - 2016. - Ст. 1611.10009. - Cited References: 60. - This work was supported by RFBR and Government of Krasnoyarsk Territory according to the research project 16-42-243048, 16-42-240413, 16-42-240746, by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, project no. SP-1844.2016.1, NSh-7559.2016.2, Russian Foundation for Basic Research, project nos. 17-02-00826, 17-02-00052, 16-02-00507, 16-02-00098, 16-02-00273. A.I. Nesterov acknowledge the support from the CONACyT.
Аннотация: Within the framework of a realistic multi-band p-d-model, we derived an effective Hamiltonian to describe the exchange interaction effects near the spin crossover in magnetic Mott-Hubbard insulators under pressure. It is shown that single-ion mechanism of spin crossover under change of the crystal field does not lead to a thermodynamic phase transition, however, at T = 0 a quantum phase transition appears. It has been found that the cooperativity leads to a modification of the quantum phase transition to a first-order phase transition and the appearance of metastable states of the system. The pressure - temperature phase diagram has been obtained to describe the magnetization and high-spin population near the spin crossover of the Motts dielectrics with d6-ions.

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Держатели документа:
CUCEI, Universidad de Guadalajara, Guadalajara, CP 44420, Jalisco, Mexico
L.V. Kirensky Institute of Physics, SB RAS, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia

Доп.точки доступа:
Nesterov, A. I.; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Nikolaev, S. V.
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Magnetic and structural phase transitions in systems with spin crossover under pressure / Y. S. Orlov [et al.] // JETP Letters. - 2017. - Vol. 105, Is. 12. - P. 771-774, DOI 10.1134/S0021364017120104. - Cited References:12. - This work was supported by the Government of Krasnoyarsk region, by the Krasnoyarsk Regional Foundation for Support of the Scientific and Scientific-Technical Activity (project nos. 16-42-243048, 16-42-240746, and 16-42-240413), by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project nos. SP-1844.2016.1 and NSh-7559.2016.2), by the Foundation for the Development of Theoretical Physics "Bazis," and by the Russian Foundation for Basic Research (project nos. 17-02-00826, 16-02-00507, 16-02-00098, and 16-02-00273). . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
FEBO3
Аннотация: The effect of the exchange interaction between excited high-spin terms of transition metal ions in magnetic Mott–Hubbard insulators on the thermodynamics of the system with singlet terms of ions in the ground state near the crossover of singlet and high-spin terms with the increase in the pressure is studied with the effective Hamiltonian. It is shown that the crossover at the temperature below the critical T* ‹ TN is a first-order phase transition and is accompanied by a volume jump. The crossover at the temperature above T* is accompanied by a smooth change in the crystal volume.

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Публикация на русском языке Магнитные и структурные фазовые переходы в системах со спиновым кроссовером под давлением [Текст] / Ю. С. Орлов [и др.] // Письма в ЖЭТФ : Наука, 2017. - Т. 105 Вып. 11-12. - С. 732-736

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Univ Guadalajara, Dept Fis, CUCEI, Guadalajara 44420, Jalisco, Mexico.

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Nikolaev, S. V.; Nesterov, A. I.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Government of Krasnoyarsk region by the Krasnoyarsk Regional Foundation for Support of the Scientific and Scientific-Technical Activity [16-42-243048, 16-42-240746, 16-42-240413]; Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools [SP-1844.2016.1, NSh-7559.2016.2]; Foundation for the Development of Theoretical Physics "Bazis"; Russian Foundation for Basic Research [17-02-00826, 16-02-00507, 16-02-00098, 16-02-00273]
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10.

Cooperative phenomena in spin crossover systems / A. I. Nesterov [et al.] // Phys. Rev. B. - 2017. - Vol. 96, Is. 13. - Ст. 134103, DOI 10.1103/PhysRevB.96.134103. - Cited References:85. - The reported study was funded by the Russian Foundation for Basic Research; the government of Krasnoyarsk Territory; the Krasnoyarsk Region Science and Technology Support Fund for research Projects No. 16-42-243048, No. 16-42-240413, No. 16-42-240746, and No. 16-43-240505; the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, Projects No. SP-1844.2016.1 and No. NSh-7559.2016.2; and the Russian Foundation for Basic Research, Projects No. 16-02-00507, No. 16-02-00098, and No. 16-02-00273. A. I. N. acknowledges the support from CONACyT. . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Physics, Condensed Matter
Рубрики:
ISING-LIKE MODEL
EARTHS LOWER MANTLE
MEAN-FIELD APPROACH
Аннотация: Within the framework of a realistic multiband p-d model, we derived an effective Hamiltonian to describe the exchange interaction effects near the spin crossover in magnetic Mott-Hubbard insulators under pressure. It is shown that the single-ion mechanism of spin crossover under the change in the crystal field does not lead to a thermodynamic phase transition; however, at T = 0 a quantum phase transition appears. It has been found that the cooperativity leads to a modification of the quantum phase transition to a first-order phase transition and the appearance of metastable states of the system. The pressure-temperature phase diagram has been obtained to describe the magnetization and high-spin population near the spin crossover of Mott's insulators with d6 ions.

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Держатели документа:
Univ Guadalajara, CUCEI, Codigo Postal 44420, Guadalajara, Jalisco, Mexico.
KSC SB RAS, Fed Res Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Siberian Fed Univ, Inst Engn & Radio Elect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Nesterov, A. I.; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Nikolaev, S. V.; Russian Foundation for Basic Research; Krasnoyarsk Territory; Krasnoyarsk Region Science and Technology Support Fund for research Projects [16-42-243048, 16-42-240413, 16-42-240746, 16-43-240505]; Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, Projects [SP-1844.2016.1, NSh-7559.2016.2]; Russian Foundation for Basic Research, Projects [16-02-00507, 16-02-00098, 16-02-00273]; CONACyT
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