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1.
Aplesnin, S. S.
Influence of spin-
phonon
coupling on the magnetic moment in 2D spin-1/2 antiferromagnet / S. S. Aplesnin> // Phys. Lett. A. - 2003. -
Vol. 313
,
Is. 1-2
. - P. 122-125,
DOI
10.1016/S0375-9601(03)00689-3. - Cited References: 17 . - ISSN 0375-9601
РУБ
Physics, Multidisciplinary
Рубрики:
SQUARE LATTICE
EU2CUO4
MODEL
Кл.слова (ненормированные):
2D Heisenberg model
--
spin-
phonon
interactions
--
2D Heisenberg model
--
Spin-
phonon
interactions
--
ferromagnetic material
--
anisotropy
--
article
--
liquid
--
magnetism
--
mathematical model
--
Monte Carlo method
--
quantum theory
--
thermal conductivity
--
vibration
Аннотация:
The ground state of two-dimensional Heisenberg spin-1/2 antiferromagnet (AF) with the spin-
phonon
coupling is studied by the quantum Monte Carlo method. The magnetic moment per site, mean-square vibration of ion, phase diagram of AF long range order-quantum spin. liquid are simulated. The spin-
phonon
coupling is estimated for R2CuO4, R = Gd, Eu. (C) 2003 Elsevier Science B.V. All rights reserved.
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Держатели документа:
LV Kirenskii Inst Phys, Russian Acad Sci, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
L. V. Kirenskii Institute of Physics, Siberian Br. of Russ. Acad. of Sci., Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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2.
Aplesnin, S. S.
Quantum magnetostriction oscillations in a two-dimensional antiferromagnet with spin-
phonon
interaction in a magnetic field / S. S. Aplesnin> // JETP Letters. - 2004. -
Vol. 79
,
Is. 1
. - P. 53-56,
DOI
10.1134/1.1675922. - Cited References: 7 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
LADDERS
Аннотация:
The ground state of a two-dimensional antiferromagnet with S = 1/2 interacting with acoustic phonons in a magnetic field was studied by the quantum Monte Carlo method in the nonadiabatic approximation. Oscillations of the amplitude of the root-mean-square displacement of ions and the average
phonon
occupation number in a magnetic field were found. Local maxima were revealed in the distribution functions of site magnetic moments and ion displacements. The saturation magnetization was calculated as a function of the spin-
phonon
coupling constant. (C) 2004 MAIK "Nauka / Interperiodica".
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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Akademgorodok, 660036, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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3.
Aplesnin, S. S.
Two-dimensional quantum spin liquid with S=1/2 spins interacting with acoustic phonons / S. S. Aplesnin> // Phys. Lett. A. - 2004. -
Vol. 333
,
Is. 5-6
. - P. 446-449,
DOI
10.1016/j.physleta.2004.10.064. - Cited References: 11 . - ISSN 0375-9601
РУБ
Physics, Multidisciplinary
Рубрики:
ANTIFERROMAGNET
Кл.слова (ненормированные):
spin-
phonon
interactions
--
spin-liquid
--
spinon excitations
--
Spin-liquid
--
Spin-
phonon
interactions
--
Spinon excitations
--
ferromagnetic material
--
acceleration
--
acoustics
--
article
--
density
--
energy
--
liquid
--
magnetic field
--
mathematical analysis
--
Monte Carlo method
--
phonon
--
quantum mechanics
Аннотация:
The spin density of states of a two-dimensional antiferromagnet in magnetic field having spins-1/2 and interacting with acoustic phonons is investigated in the nonadiabatic approximation using the quantum Monte Carlo method. It is found the gap energy A in the single particle spin excitations spectrum closes at magnetic field Delta similar or equal to H-c, W-ph
W-s, where W-ph and W-s are the bandwidths of
phonon
and spin excitations in antiferromagnet. (C) 2004 Elsevier B.V All rights reserved.
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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirenskii Institute of Physics, Siberian Br. Russ. Acad. of Sci., Krasnoyarsk 660036, Russia, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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4.
BCS-type Theory for
the Sum of Magnetic and
Phonon
Coupling in high-Tc Cuprates / E. Shneyder, S. Ovchinnikov> //
18th International Conference on Magnetism (ICM-2009). - 2009. - Ст. Mo-A-5.1-03
Доп.точки доступа:
Shneyder, E.; Ovchinnikov, S.; International Conference on Magnetism(18 ; 2009 ; July 26-31 ; Karlsruhe, Germany)
}
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5.
Berzhanskii, V. N.
Spin-
phonon
relaxation processes in CDCR2SE4 crystals / V. N. Berzhanskii, V. I. Ivanov> // Fiz. Tverd. Tela. - 1980. -
Vol. 22
,
Is. 4
. - P. 1233-1235. - Cited References: 10 . - ISSN 0367-3294
РУБ
Physics, Condensed Matter
WOS
Доп.точки доступа:
Ivanov, V. I.; Бержанский, Владимир Наумович
}
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6.
Bifurcations observed in
the spectra of coupled electron-
phonon
modes in multiferroic PrFe3(BO3)4 subjected to a magnetic field / K. N. Boldyrev [et al.]. - Electronic text data> // ArXiv. - 2016. - Ст. 1609.02125. - Cited References: 19. - This research was supported by the Russian Scientific Foundation under Grant No 14-12-01033, the President of Russian Federation (MK-3521-2015.2, K.N.B.), and the U.S. Department of Energy under Grant No DE-FG02-07ER46382 (experiments at U4-IR beamline NSLS-BNL, T.N.S. and A.A.S.). The National Synchrotron Light Source is operated as a User Facility for he U.S. Department of Energy under Contract No. DE-AC02-98CH10886. Part of this work was supported by EMFL (contract No. 26211). M.N.P. thanks B.Z. Malkin helpful discussions.
Аннотация:
We report on bifurcations effect mediated by the electron-
phonon
coupling in a concentrated rare-earth-containing antiferromagnet, observed in the spectra of coupled 4f-electron-
phonon
modes under the influence of an external magnetic field. The effect was observed in the low-temperature far-infrared (terahertz) reflection spectra of a multiferroic easy-axis antiferromagnet PrFe3(BO3)4 in magnetic fields Bext||c. Both paramagnetic and magnetically ordered phases (including a spin-flop one) were studied in magnetic fields up to 30 T. We show that the field behavior of the coupled modes can be successfully explained and modeled on the base of the equation derived in the frame of the theory of coupled electron-
phonon
modes, with the same field-independent electron-
phonon
interaction constant |W|=14.8cm−1.
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Держатели документа:
Institute of Spectroscopy, Russian Academy of Sciences, 108840 Troitsk, Moscow, Russia
Department of Physics, New Jersey Institute of Technology, 07102 Newark, New Jersey, USA
High Field Magnet Laboratory (HFML-EMFL), Radboud University, 6525 ED Nijmegen, Netherlands
Kirenskiy Institute of Physics, Siberian Branch of RAS, 660036 Krasnoyarsk, Russia
Доп.точки доступа:
Boldyrev, K. N.; Stanislavchuk, T. N.; Sirenko, A. A.; Kamenskyi, D.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Popova, M. N.
}
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7.
Bifurcations of coupled
electron-
phonon
modes in an antiferromagnet subjected to a magnetic field / K. N. Boldyrev [et al.]> // Phys. Rev. Lett. - 2017. -
Vol. 118
,
Is. 16
. - Ст. 167203,
DOI
10.1103/PhysRevLett.118.167203. - Cited References: 26. - This research was supported by the Russian Scientific Foundation under Grant No. 14-12-01033, the President of Russian Federation (MK-3577.2017.2, K. N. B.), and the U.S. Department of Energy under Grant No. DE-FG02-07ER46382 (experiments at U4-IR beam line NSLS-BNL, T. N. S. and A. A. S.). The National Synchrotron Light Source is operated as a user facility for the U.S. Department of Energy under Contract No. DE-AC02-98CH10886. Part of this work was supported by EMFL (Contract No. 26211). M. N. P. thanks B. Z. Malkin and A. V. Popov for helpful discussions. . - ISSN 0031-9007
Кл.слова (ненормированные):
Antiferromagnetic materials
--
Bifurcation (mathematics)
--
Electron-
phonon
interactions
--
Electrons
--
Magnetic fields
--
Magnetism
--
Temperature
--
Antiferromagnetic crystals
--
Bifurcation points
--
Electron
phonon
couplings
--
Electronic excitation
--
External magnetic field
--
Field independents
--
Low temperatures
--
Reflection spectra
--
Phonons
Аннотация:
We report on a new effect caused by the electron-
phonon
coupling in a stoichiometric rare-earth antiferromagnetic crystal subjected to an external magnetic field, namely, the appearance of a nonzero gap in the spectrum of electronic excitations in an arbitrarily small field. The effect was registered in the low-temperature far-infrared (terahertz) reflection spectra of an easy-axis antiferromagnet PrFe3(BO3)4 in magnetic fields Bext-c. Both paramagnetic and magnetically ordered phases (including a spin-flop one) were studied in magnetic fields up to 30 T, and two bifurcation points were observed. We show that the field behavior of the coupled modes can be successfully explained and modeled on the basis of the equation derived in the framework of the theory of coupled electron-
phonon
modes, with the same field-independent electron-
phonon
interaction constant |W|=14.8 cm-1. © 2017 American Physical Society.
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Держатели документа:
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, Russian Federation
Department of Physics, New Jersey Institute of Technology, Newark, NJ, United States
High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
Kirenskiy Institute of Physics, Siberian Branch of RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Boldyrev, K. N.; Stanislavchuk, T. N.; Sirenko, A. A.; Kamenskyi, D.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Popova, M. N.
}
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8.
Contribution of the
multiplicity fluctuation in the temperature dependence of
phonon
spectra of rare-earth cobaltites / Y. S. Orlov, A. E. Sokolov, V. A. Dudnikov [et al.]> // Molecules. - 2020. -
Vol. 25
,
Is. 18
. - Ст. 4316,
DOI
10.3390/molecules25184316. - Cited References: 34. - This work was supported by the Russian Science Foundation grant 18-02-00022. The scanning electron microscopy investigations were conducted in the SFU Joint Scientific Center, supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation. The other research was carried out at the Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” . - ISSN 1420-3049
Кл.слова (ненормированные):
Rare-earth cobalt oxides
--
Multiplicity fluctuations
--
Phonon
spectra
Аннотация:
We have studied, both experimentally and theoretically, the unusual temperature dependence of the
phonon
spectra in NdCoO3, SmCoO3 and GdCoO3, where the Co3+ ion is in the low-spin (LS) ground state, and at the finite temperature, the high-spin (HS) term has a nonzero concentration nHS due to multiplicity fluctuations. We measured the absorption spectra in polycrystalline and nanostructured samples in the temperature range 3–550 K and found a quite strong breathing mode softening that cannot be explained by standard lattice anharmonicity. We showed that the anharmonicity in the electron–
phonon
interaction is responsible for this red shift proportional to the nHS concentration.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Shulga, K. V.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Shestakov, N. P.; Шестаков, Николай Петрович; Vysotin, M. A.; Высотин, Максим Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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9.
Coupling between
phonon
and crystal-field excitations in multiferroic PrFe3(BO3)4 / K. N. Boldyrev [et al.]> // Phys. Rev. B. - 2014. -
Vol. 90
,
Is. 12
. - Ст. 121101,
DOI
10.1103/PhysRevB.90.121101. - Cited References: 35. - This research was supported by the Russian Scientific Foundation under Grant No. 14-12-01033, the President of Russian Federation (MK-1700.2013.2; K.N.B.), and the U.S. Department of Energy under Grant No. DE-FG02-07ER46382 (experiments at U4-IR beamline NSLS-BNL; T.N.S. and A.A.S.). The National Synchrotron Light Source is operated as a User Facility for the U.S. Department of Energy under Contract No. DE-AC02-98CH10886. M.N.P. thanks B. Z. Malkin for drawing her attention to the work [33] and for helpful discussions. . - ISSN 1098-0121. - ISSN 1550-235X
Перевод заглавия:
Взаимодействие между фононами и возбуждениями кристаллического поля в мультиферроике PrFe3(BO3)4
РУБ
Physics, Condensed Matter
Рубрики:
MAGNETOELECTRIC PROPERTIES
GROUND-STATE
SM
Аннотация:
Far-infrared reflection and ellipsometry measurements on multiferroic PrFe3(BO3)4 and SmFe3(BO3)4 single crystals were used to investigate the interaction between lattice phonons and electronic excitations associated with 4f crystal-field transitions. A temperature-dependent interference between two types of excitations was observed in PrFe3(BO3)4 in which the frequency of 4f crystal-field electronic excitation of Pr3+ falls into the TO-LO frequency interval of the optical
phonon
mode near 50 cm−1 (1.5 THz). Experimental data were explained on the basis of a theoretical model of coupled electron-
phonon
modes. The fitting procedure revealed the value 14.8 cm−1 for the electron-
phonon
coupling constant. This rather large value points to an essential role played by the electron-
phonon
interaction in the physics of multiferroics.
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Держатели документа:
RAS, Inst Spect, Troitsk 142190, Russia
New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA
RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Boldyrev, K. N.; Stanislavchuk, T. N.; Sirenko, A. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Popova, M. N.; Russian Scientific Foundation [14-12-01033]; President of Russian Federation [MK-1700.2013.2]; U.S. Department of Energy [DE-FG02-07ER46382, DE-AC02-98CH10886]
}
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10.
Coupling of Hubbard
fermions with phonons in La2 CuO4: A combined study using density-functional theory and the generalized tight-binding method / E. I. Shneyder [et al.]> // J. Alloys Compd. - 2015. -
Vol. 648
. - P. 258-264,
DOI
10.1016/j.jallcom.2015.05.150. - Cited References: 60. - We acknowledge the stimulating discussions with V.V. Val'kov, D.M. Dzebisashvilly, M.M. Korshunov and I.S. Sandalov. E.I.S. and S.G.O. are thankful to the Russian Science Foundation (project No. 14-12-00061) for the support of the research given in Sections 2, 6 and 7. E.E.K. and I.A.N. are thankful to the State Contract No. 0389-2014-0001 and RFBR grant No. 14-02-00065 for the support of the research given in Section 5. Financial support of the research given in Sections 3 and 4 by the Austrian Federal Government (in particular from Bundesministerium fur Verkehr, Innovation und Technologie and Bundesministerium fur Wissenschaft, Forschung und Wirtschaft) represented by Osterreichische Forschungsforderungsgesellschaft mbH and the Styrian and the Tyrolean Provincial Government, represented by Steirische Wirtschaftsforderungsgesellschaft mbH and Standortagentur Tirol, within the framework of the COMET Funding Programme is gratefully acknowledged by C.D. and J.S. . - ISSN 0925-8388
РУБ
Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
MEAN-FIELD THEORY
LINEAR-RESPONSE THEORY
CUPRATE SUPERCONDUCTORS
ELECTRONIC-STRUCTURE
CORRELATED SYSTEMS
LATTICE-DYNAMICS
BAND-STRUCTURE
LA2CUO4
MODEL
LA2-XSRXCUO4
Кл.слова (ненормированные):
High-temperature superconductivity
--
Electron-
phonon
coupling
--
Density-functional theory
--
Generalized tight-binding approach
Аннотация:
We present results for the electron-
phonon
interaction of the Γ-point phonons in the tetragonal high-temperature phase of La2 CuO4 obtained from a hybrid scheme, combining density-functional theory (DFT) with the generalized tight-binding approach. As a starting point, eigenfrequencies and eigenvectors for the Γ-point phonons are determined from DFT within the frozen
phonon
approach utilizing the augmented plane wave + local orbitals method. The so obtained characteristics of electron-
phonon
coupling are converted into parameters of the generalized tight-binding method. This approach is a version of cluster perturbation theory and takes the strong on-site electron correlations into account. The obtained parameters describe the interaction of phonons with Hubbard fermions which form quasiparticle bands in strongly correlated electron systems. As a result, it is found that the Γ-point phonons with the strongest electron-
phonon
interaction are the A2u modes (236 cm-1, 131 cm-1 and 476 cm-1). Finally it is shown, that the single-electron spectral-weight redistribution between different Hubbard fermion quasiparticles results in a suppression of electron-
phonon
interaction which is strongest for the triplet Hubbard band with z oriented copper and oxygen electrons. © 2015 Elsevier B.V. All rights reserved.
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Держатели документа:
Kirensky Institute of Physics SB RAS, Akademgorodok 50, Bld. 38, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Materials Center Leoben Forschung GmbH, Rosegger-Stra?e 18, Leoben, Austria
Institute of Electrophysics UB RAS, Amundsena Str. 106, Yekaterinburg, Russian Federation
Physics Department and IRIS Adlershof, Humboldt-Universita¨t zu Berlin, Zum Großen Windkanal 6, Berlin, Germany
Доп.точки доступа:
Shneyder, E. I.; Шнейдер, Елена Игоревна; Spitaler, J.; Kokorina, E. E.; Nekrasov, I. A.; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Draxl, C.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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11.
Deich, L. I.
On far-infrared attenuation in glasses / L. I. DEICH ; ed.: M Meissner, er, M Meis> //
Phonon
scattering in condensed matter : proceedings : Springer Verlag, 1993. -
Vol. 112
. - P. 233-234. - (Springer series in solid-state sciences). - Cited References: 0 . - ISBN 0171-1873. - ISBN 3-540-56395-4
РУБ
Physics, Condensed Matter
WOS
Держатели документа:
LV KIRENSKII INST PHYS,660036 KRASNOYARSK,RUSSIA
ИФ СО РАН
Доп.точки доступа:
Meissner, M \ed.\; Meis, er, M \ed.\; Дейч, Лев Исаакович
}
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12.
Deich, L. I.
Phonon
spectroscopy of inhomogeneities in disordered solids / L. I. Deich, V. A. Ignatchenko> // Solid State Commun. - 1991. -
Vol. 80
,
Is. 10
. - P. 881-884,
DOI
10.1016/0038-1098(91)90525-Z. - Cited References: 15 . - ISSN 0038-1098
РУБ
Physics, Condensed Matter
Рубрики:
SPIN-WAVES
AMORPHOUS FILMS
DISPERSION
FERROMAGNETS
Аннотация:
A possibility to use elastic waves for investigation of inhomogeneities corresponding in size to intermediate order in disordered solids is considered. It is shown that frequency dependencies of phase and group velocities of the elastic waves have some peculiarities which give the possibilities to find the characteristic size of inhomogenities and to determine the parameter of a matter whose fluctuations are most significant for the phenomena under study.
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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Дейч, Лев Исаакович
}
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13.
Deich, L. I.
Polarization properties of elastic-waves in anisotropic disordered media / L. I. Deich, V. A. Ignatchenko ; ed.: M Meissner, er, M Meis> //
Phonon
scattering in condensed matter : proceedings : Springer Verlag, 1993. -
Vol. 112
. - P. 231-232. - (Springer series in solid-state sciences). - Cited References: 0 . - ISBN 0171-1873. - ISBN 3-540-56395-4
РУБ
Physics, Condensed Matter
WOS
Доп.точки доступа:
Ignatchenko, V. A.; Игнатченко, Вальтер Алексеевич; Meissner, M \ed.\; Meis, er, M \ed.\; Дейч, Лев Исаакович; International Conference on
Phonon
Scattering in Condensed Matter(7 ; Aug 03-07, 1992 ; Ithaca, NY)
}
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14.
Effect of the
electron-
phonon
interaction on the formation of the exciton phase in strongly correlated systems with the spin crossover / Yu. S. Orlov, S. V. Nikolaev, V. I. Kuz'min, S. G. Ovchinnikov> //
VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. -
Vol. 2
,
Sect. H
: Magnetism of strongly correlated electron systems. - Ст. H.P15. - P. 104-105. - Cited References: 4. - The study was supported by the Russian Scientiʅc Foundation, the Krasnoyarsk Regional Fund of Science, grant No. 22-22-20007 . - ISBN 978-5-94469-051-7
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Nikolaev, S. V.; Николаев, Сергей Викторович; Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Российская академия наук; Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН; Казанский (Приволжский) федеральный университет; Euro-Asian Symposium "Trends in MAGnetism"(8 ; 2022 ; Aug. ; 22-26 ; Kazan); "Trends in MAGnetism", Euro-Asian Symposium(8 ; 2022 ; Aug. ; 22-26 ; Kazan)
}
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15.
Effects of electron-
phonon
interaction in strongly correlated copper oxides systems within alternative versions of generalized tight-binding method / E. I. Shneyder [et al.]> //
VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. O2.1. - P. 135. - References: 3. - Authors are thankful to Russian Science Foundation (project No. 14-12-00061) for financial support . - ISBN 978-5-904603-06-9
Перевод заглавия:
Эффекты электрон-фононного взаимодействия в медных оксидах с сильными электронными корреляциями в рамках альтернативных версий обобщенного метода сильной связи
Кл.слова (ненормированные):
electron-
phonon
interaction
--
strongly correlated electron systems
Доп.точки доступа:
Shneyder, E. I.; Шнейдер, Елена Игоревна; Makarov, I. A.; Макаров, Илья Анатольевич; Zotova, M. V.; Зотова, Мария Владимировна; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; 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
Нет сведений об экземплярах
}
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16.
Electron
phonon
interaction
in the lamellar cobaltate NaxCoO2 [Текст] / A. Donkov, M. M. Korshunov [и др.]> // Phys. Rev. B. - 2008. -
Vol. 77
. - С. 100504(R)
Доп.точки доступа:
Donkov, A.; Korshunov, M.M.; Eremin, I.; Lemmens, P.; Gnezdilov, V.; Chou, F.C.; Lin, C.T.
}
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17.
Electron structure and
electron-
phonon
interaction in the strongly correlated electron system of cuprates / S. G. Ovchinnikov [et al.]> // Low Temp. Phys. - 2006. -
Vol. 32
,
Is. 4-5
. - P. 483-488 ; Физика низких температур,
DOI
10.1063/1.2199450. - Cited References: 37 . - ISSN 1063-777X
РУБ
Physics, Applied
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
HIGH-TC SUPERCONDUCTIVITY
C SUPERCONDUCTORS
J MODEL
BAND
REPRESENTATION
REGIME
OXIDES
Аннотация:
The generalized tight-binding method presents a practical realization of the scheme that describes quasiparticles in a strongly correlated electron system and consists of exact intra-cell diagonalization of the model Hamiltonian and perturbative treatment of the inter-cell hoppings. In the present paper this method and its ab initio modification are applied to undoped and weakly doped HTSC cuprates. Results are in very good agreement with the experimental ARPES data on various compounds. Starting with a multiband p-d model the realistic effective low-energy Hamiltonian of strongly correlated electrons interacting with spin fluctuations and phonons is derived both for hole- and electron-doped systems. Without electron-
phonon
interaction the pure magnetic mechanism of pairing does not provide the correct value of T, even for single-layer La2-xSrxCuO4 and Nd2-xCexCuO4. (c) 2006 American Institute of Physics.
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
L. V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Korshunov, M. M.; Коршунов, Максим Михайлович; Shneyder, E. I.; Шнейдер, Елена Игоревна
}
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18.
Electron-
Phonon
Interaction and
Phonon
Renormalization in the Lamellar Cobaltate NaxCoO2 / A. . Donkov [et al.]> // J. Supercond. Nov. Magn. - 2009. -
Vol. 22
: International Conference on Quantum Phenomena in Complex Matters (JUL 26-AUG 01, 2008, Erice, ITALY),
Is. 1
. - P. 37-40,
DOI
10.1007/s10948-008-0372-6. - Cited References: 16 . - ISSN 1557-1939
РУБ
Physics, Applied + Physics, Condensed Matter
Рубрики:
SUPERCONDUCTIVITY
Кл.слова (ненормированные):
Electron-
phonon
interaction
--
Superconductivity
--
Sodium cobaltate
--
Electron-
phonon
interaction
--
Sodium cobaltate
--
Superconductivity
--
Brillouin zones
--
Cobaltate
--
Conducting electrons
--
Conduction electrons
--
Doping dependences
--
Feedback effects
--
Matrix elements
--
Phonon
frequencies
--
Phonon
modes
--
Raman experiments
--
Renormalization
--
Sodium cobaltate
--
Sodium cobaltates
--
Atoms
--
Cobalt compounds
--
Critical current density (superconductivity)
--
Electric conductivity
--
Electron-
phonon
interactions
--
Electrons
--
Flow interactions
--
Penetration depth (superconductivity)
--
Sodium
--
Superconductivity
--
Phonons
Аннотация:
We study theoretically the electron-
phonon
interaction in NaxCoO2. For the A(1g) and E-1g
phonon
modes found in Raman experiments, we calculate the matrix elements of the electron-
phonon
interaction. Analyzing the feedback effect of the conduction electrons on the
phonon
frequency., we investigate the doping dependence of these two
phonon
modes. Due to the momentum dependence of the electron-
phonon
interaction, we find the strongest renormalization of the E-1g mode around the Brillouin zone boundary which should be observed in the neutron scattering. At the same time, the A(1g) mode shows the strongest coupling to the conducting electrons around the G point and reveals its doping dependence in the Raman experiments. Our results shed light on the possible importance of the electron-
phonon
interaction in the lamellar sodium cobaltates.
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Держатели документа:
[Donkov, A.
Eremin, I.
Knolle, J.
Korshunov, M. M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Eremin, I.] TU Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, Dresden 01187, Germany
Institute fur Mathematische und Theoretische Physik, TU Braunschweig, Braunschweig 38106, Germany
Siberian Branch, Russian Academy of Sciences, L.V. Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Donkov, A.; Eremin, I.; Knolle, J.; Korshunov, M. M.; Коршунов, Максим Михайлович
}
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19.
Electron-
phonon
interaction in
the lamellar cobaltate Na(x)CoO(2) / A. . Donkov [et al.]> // Phys. Rev. B. - 2008. -
Vol. 77
,
Is. 10
. - Ст. 100504,
DOI
10.1103/PhysRevB.77.100504. - Cited References: 42 . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTIVITY
Аннотация:
We study theoretically and experimentally the dependence of the electron-
phonon
interaction in Na(x)CoO(2) on the sodium concentration x. For the two oxygen
phonon
modes found in Raman experiments, A(1g) and E(1g), we calculate the matrix elements of the electron-
phonon
interaction. Analyzing the feedback effect of the conduction electrons on the
phonon
frequency we compare the calculated and experimentally observed doping dependence of the A(1g) mode. Furthermore, due to the momentum dependence of the electron-
phonon
coupling for the E(1g) symmetry we find no renormalization of the corresponding
phonon
frequency which agrees with experiment. Our results shed light on the possible importance of the electron-
phonon
interaction in this system.
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Держатели документа:
[Donkov, A.
Korshunov, M. M.
Eremin, I.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.] Russian Acad Sci, Serbian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Eremin, I.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[Lemmens, P.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Condensed Matter Phys, D-38106 Braunschweig, Germany
[Gnezdilov, V.] Natl Acad Sci Ukraine, BI Verkin Inst Low Temp Phys, UA-61164 Kharkov, Ukraine
[Chou, F. C.] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan
[Lin, C. T.] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Institute fur Mathematische und Theoretische Physik, TU Braunschweig, D-38106 Braunschweig, Germany
Institute for Physics of Condensed Matter, TU Braunschweig, D-38106 Braunschweig, Germany
B. I. Verkin Institute for Low Temperature Physics, NASU, 61164 Kharkov, Ukraine
Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
Max Planck Institute for Solid State Research, D-70569 Stuttgart, Germany
Доп.точки доступа:
Donkov, A.; Korshunov, M. M.; Коршунов, Максим Михайлович; Eremin, I.; Lemmens, P.; Gnezdilov, V.; Chou, F. C.; Lin, C. T.
}
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20.
Enhanced electron coherence
in atomically thin Nb3SiTe6 / J. Hu [et al.]> // Nat. Phys. - 2015. -
Vol. 11
,
Is. 6
. - P. 471-476,
DOI
10.1038/NPHYS3321. - Cited References:38. - The authors are grateful to J. DiTusa for informative discussions. The work at Tulane is supported by the US National Science Foundation under grant DMR-1205469 and the NSF EPSCoR Cooperative Agreement No. EPS-1003897, with additional support from the Louisiana Board of Regents. P.W.A. and T.J.L. acknowledge the support of the US Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DE-FG02-07ER46420. L.Y.A. and P.B.S. acknowledge the support of the Russian Science Foundation (project #14-12-01217) and are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences and 'Lomonosov' Research Computing Center for the opportunity of using a cluster computer for the quantum-chemical calculations. P.B.S. acknowledges a Grant of the President of the Russian Federation for government support of young PhD scientists MK-6218.2015.2 (project ID 14.Z56.15.6218-MK). Z.I.P. acknowledges the support of the Leading Science School program (No NSh-2886.2014.2). D.N. and H.J. acknowledge support through the US Department of Energy, Office of Science, Basic Energy Sciences award DE-FG02-06ER46337. The work at UNO is supported by the US National Science Foundation under the NSF EPSCoR Cooperative Agreement No. EPS-1003897, with additional support from the Louisiana Board of Regents. . - ISSN 1745. - ISSN 1745-2481. -
РУБ
Physics, Multidisciplinary
Рубрики:
PHONON
SCATTERING RATES
WEAK-LOCALIZATION
METAL-FILMS
Аннотация:
It is now well established that many of the technologically important properties of two-dimensional (2D) materials, such as the extremely high carrier mobility in graphene(1) and the large direct band gaps in MoS2 monolayers(2), arise from quantum confinement. However, the influence of reduced dimensions on electron-
phonon
(e-ph) coupling and its attendant dephasing effects in such systems has remained unclear. Although
phonon
confinement(3-7) is expected to produce a suppression of e-ph interactions in 2D systems with rigid boundary conditions(6,7), experimental verification of this has remained elusive(8). Here, we show that the e-ph interaction is, indeed, modified by a
phonon
dimensionality crossover in layered Nb3SiTe6 atomic crystals. When the thickness of the Nb3SiTe6 crystals is reduced below a few unit cells, we observe an unexpected enhancement of the weak-antilocalization signature in magnetotransport. This finding strongly supports the theoretically predicted suppression of e-ph interactions caused by quantum confinement of phonons.
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Держатели документа:
Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA
Tulane Univ, Coordinated Instrument Facil, New Orleans, LA 70118 USA
Technol Inst Superhard & Novel Carbon Mat, Moscow 142190, Russia
Moscow Inst Phys & Technol, Moscow 141700, Russia
Emanuel Inst Biochem Phys, Moscow 119334, Russia
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Natl Univ Sci & Technol MISiS, Moscow 119049, Russia
Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA
Univ New Orleans, Dept Phys, New Orleans, LA 70148 USA
Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA
Доп.точки доступа:
Hu, J.; Liu, X.; Yue, C. L.; Liu, J. Y.; Zhu, H. W.; He, J. B.; Wei, J.; Mao, Z. Q.; Antipina, L. Yu.; Popov, Z. I.; Попов, Захар Иванович; Sorokin, P.B.; Liu, T.J.; Adams, P.W.; Radmanesh, S. M. A.; Spinu, L.; Ji, H.; Natelson, D.; US National Science Foundation [DMR-1205469]; NSF EPSCoR Cooperative Agreement [EPS-1003897]; Louisiana Board of Regents; US Department of Energy, Office of Science, Basic Energy Sciences [DE-FG02-07ER46420]; Russian Science Foundation [14-12-01217]; Russian Federation [MK-6218.2015.2, 14.Z56.15.6218-MK]; Leading Science School program [NSh-2886.2014.2]; US Department of Energy, Office of Science, Basic Energy Sciences award [DE-FG02-06ER46337]; US National Science Foundation under the NSF EPSCoR Cooperative Agreement [EPS-1003897]
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