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Author Sherman, A. ♦ Schreiber, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ TRANSITION TEMPERATURE ♦ STRONG-COUPLING MODEL ♦ GORKOV-ELIASHBERG THEORY ♦ TWO-DIMENSIONAL CALCULATIONS ♦ MAGNONS ♦ D WAVES ♦ ELECTRON-PHONON COUPLING ♦ ENERGY-LEVEL DENSITY ♦ ENERGY SPECTRA
Abstract We use the Eliashberg formalism for calculating {ital T}{sub {ital c}} in a model of cuprate perovskites with pairing mediated by both magnons and apex-oxygen vibrations. The influence of strong correlations on the energy spectrum is taken into account in the spin-wave approximation. It is shown that the hole-magnon interaction alone cannot yield high {ital T}{sub {ital c}}. But together with a moderate hole-phonon interaction it does lead to {ital d}-wave superconductivity at temperatures and hole concentrations observed in cuprates. High {ital T}{sub {ital c}} are connected with a large density of states due to extended Van Hove singularities, a conformity of the two interactions for the {ital d} symmetry, and high phonon frequencies.
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1995-10-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 52
Issue Number 14


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