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Specific heat and angle-resolved photoemission spectroscopy study of the superconducting gaps in LiFeAs

We present specific-heat, cp, and angle-resolved photoemission spectroscopy (ARPES) data on single crystals of the stoichiometric superconductor LiFeAs. A pronounced anomaly is found in cp at the superconducting transition. The electronic contribution can be described by two s-type energy gaps with...

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Main Authors: Stockert, Ulrike (Author) , Abdel-Hafiez, M. (Author) , Evtushinsky, D. V. (Author) , Zabolotnyy, V. B. (Author) , Wolter, A. U. B. (Author) , Wurmehl, S. (Author) , Morozov, I. (Author) , Klingeler, Rüdiger (Author) , Borisenko, S. V. (Author) , Büchner, B. (Author)
Format: Article (Journal)
Language:English
Published: 27 June 2011
In: Physical review. B, Condensed matter and materials physics
Year: 2011, Volume: 83, Issue: 22, Pages: 1-5
ISSN:1550-235X
DOI:10.1103/PhysRevB.83.224512
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevB.83.224512
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.83.224512
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Author Notes:U. Stockert, M. Abdel-Hafiez, D.V. Evtushinsky, V.B. Zabolotnyy, A.U.B. Wolter, S. Wurmehl, I. Morozov, R. Klingeler, S.V. Borisenko, and B. Büchner
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Summary:We present specific-heat, cp, and angle-resolved photoemission spectroscopy (ARPES) data on single crystals of the stoichiometric superconductor LiFeAs. A pronounced anomaly is found in cp at the superconducting transition. The electronic contribution can be described by two s-type energy gaps with magnitudes of approximately Δ1=1.2 meV and Δ2=2.6 meV and a normal-state γ coefficient of 10 mJ/mol K2. All these values are in agreement with ARPES results.
Item Description:Gesehen am 24.10.2022
Physical Description:Online Resource
ISSN:1550-235X
DOI:10.1103/PhysRevB.83.224512

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