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The Local Electron‐Spin‐Density Fluctuation Mechanism of the Superconductivity in Narrow‐Band Metals
Author(s) -
Grebennikov V. I.,
Sokolov O. B.
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221510223
Subject(s) - pairing , superconductivity , condensed matter physics , electron , physics , density of states , spin (aerodynamics) , electron pair , electron density , band gap , copper oxide , copper , chemistry , quantum mechanics , thermodynamics , organic chemistry
A novel mechanism is proposed of electron pairing due to local electron‐spin‐density fluctuations in copper oxide superconductors. Self‐consistent equations are formulated. Their input data are the density of states curve and the intra‐atomic electron repulsion parameter. The pairing interaction has a peak at small energy transfers. The superconductivity region is limited both, from below and from above the initial‐repulsion values. The gap width to critical temperature T c ratio is large; T c is higher than its value in the phonon mechanism.