Impurity Effect on Kramer-Pesch Core Shrinkage in s-Wave Vortex and Chiral p-Wave Vortex |
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| Authors: | Nobuhiko Hayashi Yusuke Kato Manfred Sigrist |
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| Affiliation: | (1) Institut für Theoretische Physik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland;(2) Department of Basic Science, University of Tokyo, Tokyo 153-8902, Japan |
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| Abstract: | No Heading The low-temperature shrinking of the vortex core (Kramer-Pesch effect) is studied for an isolated single vortex for chiral p-wave and s-wave superconducting phases. The effect of nonmagnetic impurities on the vortex core radius is numerically investigated in the Born limit by means of a quasiclassical approach. It is shown that in the chiral p-wave phase the Kramer-Pesch effect displays a certain robustness against impurities owing to a specific quantum effect, while the s-wave phase reacts more sensitively to impurity scattering. This suggests chiral p-wave superconductors as promising candidates for the experimental observation of the Kramer-Pesch effect.PACS numbers: 74.25.Op, 74.20.Rp, 74.70.Pq |
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