Andreev Bound States, Surfaces and Subdominant Pairing in High Tc Superconductors

Details Andreev Bound States, Surfaces and Subdominant Pairing in High Tc Superconductors Andreev Bound States, Surfaces and Subdominant Pairing in High Tc Superconductors

1997-12-19

arxiv.org/abs/cond-mat/9712234v1

J. Phys. Chem. Solids 59, pp. 2040-2044 (1998)

Physics

Condensed Matter

Superconductivity

To appear: Proceedings of SNS97, Cape Cod, September 1997. 4 pages plus 4 figures (postscript)

Scientific paper

10.1016/S0022-3697(98)00175-9

A characteristic feature of the BCS theory of superconductivity is the quantum-mechanical coherence of particle and hole states. Direct observation of particle-hole coherence in unusual superconducting materials is a strong indication of traditional superconductivity. We use the Fermi liquid theory of superconductivity to study the implications of particle-hole coherence on properties of d-wave superconductors near surfaces. Typical surface phenomena are the suppression of the superconducting order parameter, surface bound states associated with Andreev reflection, anomalous screening currents, and spontaneous breaking of time-reversal symmetry. We review these phenomena and present new results for the effects of surface roughness.

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