Density of states and order parameter in dirty anisotropic superconductors
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Date
1996
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Publisher
American Physical Society
Abstract
We analyze in detail how the scattering by nonmagnetic impurities affects the shape and amplitude of the order parameter (OF) 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 d and 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.
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Journals published by the American Physical Society can be found at http://journals.aps.org/
Keywords
HIGH-TEMPERATURE SUPERCONDUCTORS, D-WAVE SUPERCONDUCTORS, ANGLE-RESOLVED, PHOTOEMISSION, PLANE ANISOTROPY, BI2SR2CACU2O8+DELTA, YBA2CU3O7-DELTA, PHASE, Y1-XPRXBA2CU3O7-DELTA, TRANSITION, SYMMETRY, Physics
Citation
SV Pokrovsky and Valery L. Pokrovsky. Phys.Rev.B 54 13275-13287 1996."Copyright (1996) by the American Physical Society."