Zobrazeno 1 - 10 of 183 pro vyhledávání: '"V A, Val'kov"'
1
Excitation Spectrum in an Ensemble of Hubbard Bosons
Autor: V. V. Val’kov
Publikováno v: JETP Letters. 116:896-901
An approach that makes it possible to correctly derive equations describing the Bose–Einstein condensation and the spectrum of elementary excitations in the ensemble of Hubbard bosons in the strong correlation regime $$(U \gg {\text{|}}{{t}_{{fm}}}
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16c7a087753b2b77953be02bf524ed9b
https://doi.org/10.1134/s0021364022602664
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6
Spin-polaron concept in the theory of normal and superconducting states of cuprates
Autor: V. V. Val’kov, A. F. Barabanov, D. M. Dzebisashvili, Maksim Mikhailovich Korovushkin
Publikováno v: Physics-Uspekhi. 64:641-670
The review discusses the emergence of the spin-fermion model of cuprates and the formation of the spin-polaron concept of the electronic structure of hole-doped cuprate superconductors. This concept has allowed describing the properties of cuprates i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d3d6df200f04a2da8b8c1fbd2de6d3ad
https://doi.org/10.3367/ufne.2020.08.038829
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8
Edge States of an Excitonic Insulator with the Spin—Orbit Interaction
Autor: V. V. Val’kov
Publikováno v: JETP Letters. 111:647-652
The effect of the spin-orbit and Coulomb interactions on the symmetry and topological properties of the s, p, d, and s + d phases of an excitonic insulator has been considered by example of the inverted two-band structure of the HgTe quantum well. It
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d169af1787ca4fedd7607ca1f7434ecc
https://doi.org/10.1134/s0021364020110107
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9
Jumplike Magnetic Disordering Processes Stimulated by a Magnetic Field in Systems with Structural Instability
Autor: V.I. Mitsiuk, V. V. Koledov, B. M. Todris, V. I. Val’kov, A. V. Golovchan
Publikováno v: Physics of the Solid State. 62:798-807
A theoretical analysis of the features of first-order structural and magnetostructural transitions in magnetocaloric helimagnetic alloys of the Mn1 – xCrxNiGe system is performed. The observed structural transitions of the displacement type hex(P63
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d2844a40a487280d27dd00c1ed756922
https://doi.org/10.1134/s1063783420050315
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10
Gapless Chiral Superconducting (d + id)-Wave Phase in Strongly Correlated Layered Material with a Triangular Lattice
Autor: T. A. Val’kova, V. V. Val’kov, V. A. Mitskan
Publikováno v: Journal of Experimental and Theoretical Physics. 130:235-246
It is shown that interlayer electron tunneling in the quasi-two-dimensional ensemble of Hubbard fermions leads to the realization of the gapless superconducting phase with the chiral (d + id)-wave order parameter symmetry, not for a single value of s
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f98c18c4875e2f57fc7fe018872a191
https://doi.org/10.1134/s1063776120010197
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