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Author Pokrovsky, S. V. ♦ Pokrovsky, V. L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ ORDER PARAMETERS ♦ BCS THEORY ♦ QUASI PARTICLES ♦ ENERGY GAP ♦ ENERGY-LEVEL DENSITY ♦ TRANSITION TEMPERATURE ♦ ELECTRIC CONDUCTIVITY ♦ ELECTRONIC STRUCTURE ♦ IMPURITIES
Abstract We analyze in detail how the scattering by nonmagnetic impurities affects the shape and amplitude of the order parameter (OP) and the density of states in anisotropic superconductors in the framework of BCS theory. Special attention is paid to the case when the OP is a mixture of {ital d} and {ital s} waves changing its sign on the Fermi surface. The critical temperature is shown to decay with the increase of the residual resistance according to the power law. At zero temperature impurity scattering gives rise to a peculiar phase transition from a gapless regime to a state with a finite gap in the quasiparticle spectrum. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-11-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 18


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