Strong nonlinear galvanomagnetic effects in thin superconducting films

Anatoly Kuklov; Alexei Bulatov; Joseph L. Birman

doi:10.1103/PhysRevLett.72.2274

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Strong nonlinear galvanomagnetic effects in thin superconducting films

Anatoly Kuklov, Alexei Bulatov, Joseph L. Birman

DOI 10.1103/PhysRevLett.72.2274 · Physical Review Letters

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Abstract

We show that in a certain range of parameters the interaction between vortices causes significant enhancement of galvanomagnetic effects in thin superconducting films, as opposed to thick films. In particular, the Nernst coefficient acquires a contribution exceeding the single vortex term at relatively small external magnetic fields. The possibility of inducing the dc voltage due to either vortex-antivortex pair production by ac external currents or pair-breaking radiation is also discussed. Our results give a possible explanation for the experiments of A. Gerber and G. Deutcher.