Density of states and order parameter in dirty anisotropic superconductors

Journal Article · Thu Oct 31 23:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.13275· OSTI ID:389339

Pokrovsky, S V ^[1]; Pokrovsky, V L ^[2]

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1. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachussetts 02139-4307 (United States)
2. Department of Physics, Texas A&M University, College Station, Texas 77843-4242 (United States)

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.}

• OSTI ID: 389339
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 18 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BCS THEORY
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
ENERGY GAP
ENERGY-LEVEL DENSITY
HIGH-TC SUPERCONDUCTORS
IMPURITIES
ORDER PARAMETERS
QUASI PARTICLES
TRANSITION TEMPERATURE