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Anomalous spectral properties of strongly correlated systems within the cluster perturbation theory / V. I. Kuz'min, S. V. Nikolaev, S. G. Ovchinnikov // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 2. - Ст. I.P9. - P. 151-152. - Cited References: 4. - The reported study was funded by Russian Foundation for Basic Research (RFBR) according to the research project no. 18-32-00256, RFBR and Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project: “18-42-240017 Features of electron-phonon coupling in high-temperature superconductors with strong electron correlations” and the research project: “18-42-243004 New thermoelectric materials based on multi-scale spatially inhomogeneous substituted rare-earth cobalt oxides and the Ruddlesden-Popper phases” . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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Doping and temperature evolution of pseudogap and spin-spin correlations in the two-dimensional Hubbard model [Preprint] / V. I. Kuz'min, M. A. Visotin, S. V. Nikolaev, S. G. Ovchinnikov. - Electronic text data // ArXiv. - 2020. - Ст. 2001.05143. - Cited References: 86. - The reported study was funded by RFBR according to the research project No. 18-32-00256 (all the results concerning the influence of short-range correlations on the electronic spectral properties). The reported study was also funded by Russian Foundation for Basic Research and Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects “Electronic correlation effects and multiorbital physics in iron-based materials and cuprates” number 19-42-240007, and “Features of electron-phonon coupling in high-temperature superconductors with strong electron correlations” number 18-42-240017
Рубрики:
Strongly Correlated Electrons
Аннотация: Cluster perturbation theory is applied to the two-dimensional Hubbard t−t′−t′′−U model to obtain doping and temperature dependent electronic spectral function with 4×4 and 12-site clusters. It is shown that evolution of the pseudogap and electronic dispersion with doping and temperature is similar and in both cases it is significantly influenced by spin-spin short-range correlations. When short-range magnetic order is weakened by doping or temperature and Hubbard-I like electronic dispersion becomes more pronounced, the Fermi arc turns into large Fermi surface and the pseudogap closes. It is demonstrated how static spin correlations impact the overall dispersion's shape and how accounting for dynamic contributions leads to momentum-dependent spectral weight at the Fermi surface and broadening effects.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036 Russia
Siberian Federal University, Krasnoyarsk, 660041 Russia

Доп.точки доступа:
Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Visotin, M. A.; Высотин, Максим Александрович; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Doping and temperature evolution of pseudogap and spin-spin correlations in the two-dimensional Hubbard model / V. I. Kuz'min, M. A. Visotin, S. V. Nikolaev, S. G. Ovchinnikov // Phys. Rev. B. - 2020. - Vol. 101, Is. 11. - Ст. 115141, DOI 10.1103/PhysRevB.101.115141. - Cited References: 97. - The reported study was funded by RFBR according to Research Project No. 18-32-00256 (all the results concerning the influence of short-range correlations on the electronic spectral properties). The reported study was also funded by RFBR according to Research Project No. 18-32-01062; the Russian Foundation for Basic Research and Government of Krasnoyarsk Territory, the Krasnoyarsk Regional Fund of Science to the Research Projects "Electronic correlation effects and multiorbital physics in iron-based materials and cuprates" No. 19-42-240007 and "Features of electron-phonon coupling in high-temperature superconductors with strong electron correlations" No. 18-42-240017. . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
QUASI-PARTICLE DISPERSION
   FERMI-SURFACE
   QUANTUM OSCILLATIONS
   LANCZOS METHOD
Аннотация: Cluster perturbation theory is applied to the two-dimensional Hubbard t - t' - t '' - U model to obtain doping and temperature-dependent electronic spectral function with 4 x 4 and 12-site clusters. It is shown that evolution of the pseudogap and electronic dispersion with doping and temperature is similar and in both cases it is significantly influenced by spin-spin short-range correlations. When short-range magnetic order is weakened by doping or temperature and Hubbard-I-like electronic dispersion becomes more pronounced, the Fermi arc turns into a large Fermi surface and the pseudogap closes. It is demonstrated how static spin correlations impact the overall dispersion's shape and how accounting for dynamic contributions leads to momentum-dependent spectral weight at the Fermi surface and broadening effects.

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

Доп.точки доступа:
Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Visotin, M. A.; Высотин, Максим Александрович; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; RFBRRussian Foundation for Basic Research (RFBR) [18-32-00256, 18-32-01062]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [19-42-240007, 18-42-240017]
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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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Excitonic ordering in strongly correlated spin crossover systems: Induced magnetism and excitonic excitation spectrum / Yu. S. Orlov, S. V. Nikolaev, V. I. Kuz'min [et al.] // Phys. Rev. B. - 2022. - Vol. 106, Is. 23. - Ст. 235120, DOI 10.1103/PhysRevB.106.235120. - Cited References: 50. - The authors thank the Russian Scientific Foundation for financial support under Grant No.18-12-00022 . - ISSN 2469-9950. - ISSN 2469-9969
Аннотация: The effects associated with interatomic hoppings of excitons and the excitonic Bose condensate formation in strongly correlated spin crossover systems are considered in the framework of the effective Hamiltonian for the two-band Kanamori model. The appearance of antiferromagnetic ordering due to the exciton order is found even in the absence of interatomic exchange interaction. The spectrum of excitonic excitations is calculated at various points of the temperature vs crystal field phase diagram. Outside the region of exciton ordering, the spectrum has a gap, which vanishes at the boundary of the exciton condensate phase. The nonuniform spectral weight distribution over the Brillouin zone is found. The role of electron-phonon interaction is discussed as well.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041 Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036 Russia

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Nikolaev, S. V.; Николаев, Сергей Викторович; Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Zarubin, A. E.; Зарубин, А. Е.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Influence of canted antife rromagnetic order on the electronic spectral function in 2d strongly correlated electronic systems / V.I Kuz'min, S. V. Nikolaev, S. G. Ovchinnikov // Moscow International Symposium on Magnetism (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 3PO-I-21. - P. 578

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Доп.точки доступа:
Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
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    International workshop on actual problems of condensed matter physics : Program. Book of abstracts / Fed. Res. Center KSC SB RAS, Kirensky Inst. of phys., Sib. Fed. Univ. ; предс. прогр. ком. S. G. Ovchinnikov. - Krasnoyarsk : [s. n.], 2017. - 30 p.
    Содержание:
Bondarev, I. A. Magnetic and transport properties of the epitaxial Fe3Si film on a Si substrate / I. A. Bondarev. - P .25
Yakovlev, I. A. The magnetic anisotropy of the Fe and Fe(1-x)Si(x) thin films depend on / I. A. Yakovlev [и др.]. - P .12
Другие авторы: Belyaev B. A., Rautskii M. V., Tarasov, I. A., Varnakov S. N, Ovchinnikov, S. G.
Popkov, S. I. Inverted opals as the Josephson networks of weak links : Invited / S. I. Popkov [и др.]. - P .24
Другие авторы: Gokhfeld D. M., Bykov A., Mistonov A., Shabanov A., Terentiev K.
Nikolaev, S. Electronic structure and Fermi surface within the cluster perturbation theory in X-operators representation : Invited / S. Nikolaev, V. I. Kuz'min, S. G. Ovchinnikov. - P .27
Fedorov, A. S. DFT investigation of electronic and optical magnetic properties of one dimensional transition metal halide structuresTmHaI3 : Invited / A. S. Fedorov [и др.]. - P .20
Другие авторы: Kuzubov A. A., Kovaleva E. A., Popova M. I., Kholtobina A. S., Mikhaleva N. S., Visotin M. A.
Ovchinnikov, S. G. Effect of interatomic exchange interaction on spin crossover and Mott-Hubbard transition under high pressure and the physical properties of the low Earth’s mantle : Invited / S. G. Ovchinnikov [и др.]. - P .26
Другие авторы: Orlov Yu. S., Nikolaev S., Nesterov A., Ovchinnikova T.
Tarasov, I. A. Extremely high magnetic-field sensitivity of charge transport in the Mn/SiO2/p-Si hybrid structure / I. A. Tarasov [и др.]. - P .21
Другие авторы: Smolyakov D. A., Rautskii M. V., Lukyanenko A. V., Yakovlev I. A., Ovchinnikov S. G., Volkov N. V.
Volkov, N. V. Marnetic-field sensitivity of charge transport in silicon-based hybrid structures : Invited / N. V. Volkov [et al.]. - P .10
Другие авторы: Tarasov A. S., Rautskii M. V., Lukyanenko A. V., Varnakov S. N., Bondarev I. A., Ovchinnikov S. G.
Lukyanenko, A. V. Fabrication of multi-terminal planar devices based on epitaxial Fe1-xSix films grown on Si(111) / A. V. Lukyanenko, A. S. Tarasov, I. A. Tarasov [et al.] ; A. V. Luyanenko [и др.]. - P .28
Другие авторы: Tarasov A. S., Tarasov I. A., Bondarev I. A., Smolyarova T. E., Yakovlev I. A., Volochaev M. N., Varnakov S. N., Ovchinnikov S. G., Volkov N. V.
Rautskii, M. V. Magnetic field-driven lateral photovoltaic effect in the Fe/SiO2/p-Si hibrid structure with the Scottky barrier / M. V. Rautskii [и др.]. - P .29
Другие авторы: Tarasov A. S., Varnakov S. N., Bondarev I. A., Volochaev M. N., Lukyanenko A. V., Volkov N. V.
Moryachkov, R. Small angle X-ray scattering and atomic structure of aptamer biomolecules / R. Moryachkov [и др.]. - P .14-15
Другие авторы: Tomilin F. N., Shchugoreva I., Spiridonova V., Peters G., Zabluda V.
Tarasov, I. A. Iron silicides and pure iron epitaxial and highly-textured nanostructures on silicon: growth and their physical properties : Invited / I. A. Tarasov [и др.]. - P .23
Другие авторы: Visotin M. A., Solovyov L. A., Rautskii M. V., Zhandun, V. S., Nemtsev I. V., Yakovlev I. A., Varnakov S. N, Ovchinnikov, S. G.
Sokolov, A. E. Magnetic nanoparticles and DNA-aptamers conjugates for diagnostics and therapy of cancer : Invited / A. E. Sokolov [и др.]. - P .13
Другие авторы: Zamay S., Zamay T., Svetlichnyi V., Velikanov D.
Sandalov, I. S. The microscopic origin of ferromagnetism in Fe silicides : Invited / I. S. Sandalov [и др.]. - P .16
Другие авторы: Zamkova N. G., Zhandun V. S., Ovchinnikov, S. G.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Ovchinnikov, S. G. \предс. прогр. ком.\; Овчинников, Сергей Геннадьевич; Lukyanenko, A. V.; Varnakov, S. N.; Bondarev, I. A.; Ovchinnikov, S. G.; Tarasov, I. A.; Svetlichnyi, V.; Velikanov, D. A.; Spiridonova, V.; Peters, G.; Zabluda, V. N.; Popova, M. I.; Kholtobina, A. S.; Mikhaleva, N. S.; Visotin, M. A.; Yakovlev, I. A.; Volkov, N. V.; Rautskii, M. V.; Zhandun, V. S.; Nemtsev, I. V.; Varnakov, S. N; Mistonov, A.; Shabanov, A. V.; Terentiev, K. Yu.; Nesterov, A.; Ovchinnikova, T.; Smolyarova, T. E.; Volochaev, M. N.; Federal Research Center KSC SB RAS; Kirensky Institute of Physics; Siberian Federal Univercity; International Workshop on Actual Problems of Condensed Matter Physics (27 Mar. - 1 Apr. 2017 ; Krasnoyarsk / Cheremushki)
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Kuz'min, V. I.
Comparison of the electronic structure of the Hubbard and t - J models within the cluster perturbation theory / V. I. Kuz'min, S. V. Nikolaev, S. G. Ovchinnikov // Phys. Rev. B. - 2014. - Vol. 90, Is. 24. - Ст. 245104, DOI 10.1103/PhysRevB.90.245104. - Cited References: 37. - This work is supported by RFBR (Grants No. 13-02-01395-a, No. 14-02-31677-mol-a, and No. 14-02-00186-a), the Ministry of Education and Science of Russia (Government Contract No. 3085, SibFU 2014 GF-2), and a grant of the Russian President (Grant No. NSh-2886.2014.2). . - ISSN 1098-0121. - ISSN 1550-235X

РУБ Physics, Condensed Matter
Рубрики:
FERMION SYSTEMS
SUPERCONDUCTIVITY
METAL
Аннотация: Electronic dispersion and density of states (DOS) have been calculated for the Hubbard model and the t−J and t−J∗ models with three-site correlated hopping by the cluster perturbation theory. We have found a rather strong quantitative difference both in dispersion and DOS at all doping for the Hubbard and t−J models at the energy scale ω≳t. The three-site correlated hopping addition results in an almost negligible difference for the Hubbard and t−J∗ models. Close to the Fermi energy, at the scale ω≲J, the electronic structure of all three models is similar. We have found the line of zeros of the Green function for the t−J model that has been previously obtained for the Hubbard model by cellular dynamical mean-field theory calculations.

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Держатели документа:
SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Кузьмин, Валерий Ипполитович; RFBR [13-02-01395-a, 14-02-31677-mol-a, 14-02-00186-a]; Ministry of Education and Science of Russia [3085, SibFU 2014 GF-2]; [NSh-2886.2014.2]
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10.

Kuz'min, V. I.
Comparison of the electronic structure of the Hubbard and t-J models within the cluster perturbation theory / V. I. Kuz’min, S. V. Nikolaev, S. G. Ovchinnikov // Пятая Междунар. конф. "Фундаментал. проблемы высокотемператур. сверхпроводимости" (ФПС’15) : сборник расширенных тезисов. - М. : ФИАН, 2015. - Ст. M7. - С. 58-59

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Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Кузьмин, Валерий Ипполитович; "Фундаментальные проблемы высокотемпературной сверхпроводимости", Международная конференция(5 ; 2015 ; окт. ; 5-9 ; Малаховка, Моск. обл.); Российская академия наук; Физический институт им. П.Н. Лебедева РАН; Научный совет по физике конденсированного состояния РАН; Научный совет по физике низких температур РАН
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