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

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

2010-11-18

arxiv.org/abs/1011.4246v1

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

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.

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