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Impurity effect on Kramer-Pesch core shrinkage ins-wave vortex and chiralp-wave vortex

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Abstract

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.

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Authors and Affiliations

  1. Institut für Theoretische Physik, ETH-Hönggerberg, CH-8093, Zürich, Switzerland

    Nobuhiko Hayashi & Manfred Sigrist

  2. Department of Basic Science, University of Tokyo, 153-8902, Tokyo, Japan

    Yusuke Kato

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  1. Nobuhiko Hayashi
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  2. Yusuke Kato
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Hayashi, N., Kato, Y. & Sigrist, M. Impurity effect on Kramer-Pesch core shrinkage ins-wave vortex and chiralp-wave vortex. J Low Temp Phys 139, 79–96 (2005). https://doi.org/10.1007/BF02769568

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