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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Korovushkin M. M.
Заглавие : Energy structure of high-temperature superconductors with the intersite Coulomb interaction
Коллективы : Russian Academy of Sciences; Russian Foundation for Basic Research [07-02-00226]; RAS; Dynasty Foundation
Место публикации : Eur. Phys. J. B: SPRINGER, 2009. - Vol. 69, Is. 2. - P219-227. - ISSN 1434-6028, DOI 10.1140/epjb/e2009-00141-4
Примечания : Cited References: 26. - This study was supported by the program "Quantum physics of condensed matter"of the Presidium of the Russian Academy of Sciences (RAS); the Russian Foundation for Basic Research (project no. 07-02-00226); the Siberian Branch of RAS (Interdisciplinary Integration project no. 53). One of authors (M. K.) would like to acknowledge the support of the Dynasty Foundation.
Предметные рубрики: HIGH-TC SUPERCONDUCTIVITY
SINGLE-BAND
ELECTRON CORRELATIONS
CU OXIDES
J MODEL
DERIVATION
Ключевые слова (''Своб.индексиров.''): strongly correlated electron systems; heavy fermions--narrow-band systems; intermediate-valence solids--cuprate superconductors--strongly correlated electron systems heavy fermions--narrow-band systems intermediate-valence solids--cuprate superconductors--emery model--energy structures--fermi state--integrated density--root mean squares--spectral intensity--copper compounds--corundum--coulomb interactions--electrons--fermions--high temperature superconductors--oxide superconductors--superconductivity
Аннотация: The effect of the intersite Coulomb interaction of fermions on the ground state and energy structure of high-temperature superconductors is considered within the three-band Emery model using an extended basis of the irreducible operators orthogonal on Mori. The proposed theory allows prediction of bands of the fluctuation states whose spectral intensity grows with an increase in the root-mean-square fluctuations of the occupation numbers. The increase in these fluctuations in high-temperature superconductors upon doping plays a key role in redistribution of the integrated density of the Fermi states.
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