Electronic states on a twin boundary of a d-wave superconductor

Details Electronic states on a twin boundary of a d-wave superconductor Electronic states on a twin boundary of a d-wave superconductor

1997-05-20

arxiv.org/abs/cond-mat/9705202v1

Phys. Rev. Lett. 79, 1734 (1997)

Physics

Condensed Matter

Superconductivity

4 pages, ReVTEX, 2 PS-figures

Scientific paper

10.1103/PhysRevLett.79.1734

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.

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