Strong surface contribution to the Nonlinear Meissner Effect

Details Strong surface contribution to the Nonlinear Meissner Effect Strong surface contribution to the Nonlinear Meissner Effect

2010-03-12

arxiv.org/abs/1003.2527v1

Phys. Rev. Lett. 104, 237001 (2010)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.104.237001

We demonstrate that in a d-wave superconductor the bulk nonlinear Meissner effect is dominated by a surface effect due to Andreev bound states at low temperatures. The contribution of this surface effect to the nonlinear response coefficient follows a 1/T^3 law with opposite sign compared to the bulk 1/T behavior. The cross-over from bulk dominated behavior to surface dominated behavior occurs at a temperature of T/T_c ~ 1/sqrt(kappa). We present an approximate analytical calculation, which supports our numerical calculations and provides a qualitative understanding of the effect. The effect can be probed by intermodulation distortion experiments.

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