Extended Impurity Potential in a d_{x^2-y^2} Superconductor

Preprint

23 January 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9701170

Abstract

We investigate the role of a finite potential range of a nonmagnetic impurity for the local density of states in a d_{x^2-y^2} superconductor. Impurity induced subgap resonances are modified by the appearance of further scattering channels beyond the $s$--wave scattering limit. The structure of the local density of states (DOS) in the vicinity of the impurity is significantly enhanced and therefore improves the possibility for observing the characteristic anisotropic spatial modulation of the local DOS in a d_{x^2-y^2} superconductor by scanning tunneling microscopy.

Keywords

IMPURITY POTENTIAL
EXTENDED IMPURITY
DENSITY OF STATES
FINITE POTENTIAL
POTENTIAL RANGE
SUPERCONDUCTOR
LOCAL DENSITY
SCATTERING
TUNNELING

All Related Versions

Version 1, 1997-01-23, ArXiv
Published version: Physical Review B, 56 (5), 2360.

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