Broadening of Andreev-Bound States in d_{x^2-y^2} superconductors

Details Broadening of Andreev-Bound States in d_{x^2-y^2} superconductors Broadening of Andreev-Bound States in d_{x^2-y^2} superconductors

1998-07-03

arxiv.org/abs/cond-mat/9807052v1

Phys. Rev. B 59, 7102 (1999)

Physics

Condensed Matter

Superconductivity

6 page including 7 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.59.7102

We investigate the broadening of the bound states at an interface of an unconventional superconductor by bulk impurity scattering. We use the quasiclassical theory and include impurity scattering in the Born and in the unitarity limit. The broadening of bound states due to unitary scatterers is shown to be substantially weaker than in the Born limit. We study various model geometries and calculate the temperature dependence of the Josephson critical current in the presence of these impurity-broadened bound states.

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