Gap Anisotropy and de Haas-van Alphen Effect in Type-II Superconductors

Details Gap Anisotropy and de Haas-van Alphen Effect in Type-II Superconductors Gap Anisotropy and de Haas-van Alphen Effect in Type-II Superconductors

2001-03-16

arxiv.org/abs/cond-mat/0103336v3

J. Phys. Soc. Jpn. 70, 2852 (2001)

Physics

Condensed Matter

Superconductivity

5 pages, 1 figure, changes in Introduction

Scientific paper

10.1143/JPSJ.70.2852

We present a theoretical study on the de Haas-van Alphen (dHvA) oscillation in the vortex state of type-II superconductors, with a special focus on the connection between the gap anisotropy and the oscillation damping. Numerical calculations for three different gap structures clearly indicate that the average gap along extremal orbits is relevant for the magnitude of the extra damping, thereby providing a support for experimental efforts to probe gap anisotropy through the dHvA signal. We also derive an analytic formula for the extra damping which gives a good fit to the numerical results.

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