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Regensburg 1998 – scientific programme

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TT: Tiefe Temperaturen

TT 6: Symmetrie des Ordnungsparameters in HTSL

TT 6.1: Invited Talk

Monday, March 23, 1998, 14:30–15:00, H 20

Andreev Bound States, Surfaces and Subdominant Pairing in High-Tc Superconductors — •D. Rainer1, H. Burkhardt1, and J.A. Sauls21Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth — 2Department of Physics & Astronomy, Northwestern University, Evanston, IL 60208

A unique feature of the traditional BCS model of superconductivity is the quantum-mechanical coherence of particle and hole states. We use the Fermi liquid model of superconductivity to study the implications of particle-hole coherence on properties of d-wave superconductors near surfaces. Typical surface phenomena are a suppression of superconducting order, surface states bound by repeated Andreev reflections, anomalous screening currents, and spontaneous breaking of time reversal. We review these phenomena and present new results on the effects of surface roughness.

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