Electronic States on a Twin Boundary of a-Wave Superconductor
- 1 September 1997
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 79 (9) , 1734-1737
- https://doi.org/10.1103/physrevlett.79.1734
Abstract
We show that an induced $s$-wave harmonic in the superconducting gap of an orthorhombic $d_{x^2-y^2}$ 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.Comment: 4 pages, ReVTEX, 2 PS-figure
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