Influence of surface roughness on subdominant pairing in d-wave superconductors
Article first published online: 13 OCT 2003
Copyright © 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Annalen der Physik
Volume 12, Issue 7-8, pages 438–445, October 2003
How to Cite
Lück, T. (2003), Influence of surface roughness on subdominant pairing in d-wave superconductors. Ann. Phys., 12: 438–445. doi: 10.1002/andp.200310021
- Issue published online: 13 OCT 2003
- Article first published online: 13 OCT 2003
- Manuscript Accepted: 3 JUL 2003
- Manuscript Revised: 30 JUN 2003
- Manuscript Received: 14 APR 2003
- d-wave superconductivity;
- quasiclassical theory;
- time-reversal symmetry breaking.
We study a d-wave superconductor with dominant d-wave order parameter and subdominant pairing in either the s- or the dxy-wave channel near a surface. In particular we analyze the influence of surface roughness on the mixed order parameter which may break the time-reversal symmetry. We find that the subdominant component is suppressed by the roughness independent of its pairing symmetry; for very rough surfaces the subdominant component may even vanish completely. Additionally we discuss a possible real-valued admixture which counteracts the suppression of the d-wave order parameter at the surface.