Electronic States on a Twin Boundary of a d-Wave Superconductor
Abstract
We show that an induced s-wave harmonic in the superconducting gap of an orthorhombic dx2-y2 superconductor strongly affects the excitation spectrum near a twinning plane. In particular, it yields bound states of zero energy with areal density proportional to the relative weight of the s-wave component. An unusual scattering process responsible for the thermal conductivity across the twin boundary at low temperatures is also identified.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 1997
- DOI:
- 10.1103/PhysRevLett.79.1734
- arXiv:
- arXiv:cond-mat/9705202
- Bibcode:
- 1997PhRvL..79.1734Z
- Keywords:
-
- Condensed Matter - Superconductivity
- E-Print:
- 4 pages, ReVTEX, 2 PS-figures