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Impurity effect in a holographic superconductor

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Abstract

We consider a holographic superconductor with homogeneous impurities added. We start with the holographic Abelian-Higgs model for s-wave superconductivity, and turn on a coupling between the gauge field and a new massive gauge field that is introduced for impurities, whose effect is examined in the probe limit. We find that the condensation of the massive gauge field is induced in the superconducting phase. When the coupling is sufficiently large, the mass gap in the optical conductivity disappears. A resonance peak is found in the conductivity of the massive vector field.

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Authors and Affiliations

  1. Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Korea

    Takaaki Ishii

  2. Department of Physics, Hanyang University, Seoul, 133-791, Korea

    Sang-Jin Sin

Authors
  1. Takaaki Ishii
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  2. Sang-Jin Sin
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Correspondence to Sang-Jin Sin.

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ArXiv ePrint: 1211.1798

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Ishii, T., Sin, SJ. Impurity effect in a holographic superconductor. J. High Energ. Phys. 2013, 128 (2013). https://doi.org/10.1007/JHEP04(2013)128

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  • DOI: https://doi.org/10.1007/JHEP04(2013)128

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