The superconducting gaps in LiFeAs: Joint study of specific heat and ARPES

U. Stockert; M. Abdel-Hafiez; D. V. Evtushinsky; V. B. Zabolotnyy; A. U. B. Wolter; S. Wurmehl; I. Morozov; R. Klingeler; S. V. Borisenko; B. Büchner

doi:10.1103/PhysRevB.83.224512

The superconducting gaps in LiFeAs: Joint study of specific heat and ARPES

Superconductivity 2012-08-01 v1

Authors: U. Stockert , M. Abdel-Hafiez , D. V. Evtushinsky , V. B. Zabolotnyy , A. U. B. Wolter , S. Wurmehl , I. Morozov , R. Klingeler , S. V. Borisenko , B. Büchner

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Abstract

We present specific heat, c_P, and ARPES data on single crystals of the stoichiometric superconductor LiFeAs. A pronounced anomaly is found in c_P at the superconducting transition. The electronic contribution can be described by two s-type energy gaps with magnitudes of approximately Delta1 = 1.2 meV and Delta2 = 2.6 meV and a normal-state gamma coefficient of 10 mJ/mol K^2. All these values are in remarkable agreement with ARPES results.

Keywords

LiFeAs superconducting gap specific heat ARPES s-wave gap stoichiometric superconductor

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@article{arxiv.1011.4246,
  title  = {The superconducting gaps in LiFeAs: Joint study of specific heat and ARPES},
  author = {U. Stockert and M. Abdel-Hafiez and D. V. Evtushinsky and V. B. Zabolotnyy and A. U. B. Wolter and S. Wurmehl and I. Morozov and R. Klingeler and S. V. Borisenko and B. Büchner},
  journal= {arXiv preprint arXiv:1011.4246},
  year   = {2012}
}

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4 pages, 3 figures

The superconducting gaps in LiFeAs: Joint study of specific heat and ARPES

Abstract

Keywords

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