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1 PublikationTwo-gap superconductivity in Ag1–x Mo6S8 Chevrel phase
Feig, M.; Bobnar, M.; Veremchuk, I.; Hennig, C.; Burkhardt, U.; Starke, R.; Kundys, B.; Leithe-Jasper, A.; Gumeniuk, R.
Abstract
The superconducting properties of Ag1−xMo6S8 [x = 0.08(1)] Chevrel phase [Tc = 7.9(5) K] are studied on a sample compacted by spark plasma sintering. Both lower [Bc1 = 12(1) mT] and the upper [Bc2(0) ~ 7.4(9) T] critical magnetic fields are obtained from magnetization and electrical resistivity measurements for the first time. The analysis of the low-temperature electronic specific heat indicates Ag1−xMo6S8 to be a two band superconductor with the energy gaps delta-1 = 1.6 meV (95 %) and delta-2 = 0.7 meV (5 %). Theoretical DFT calculations reveal a much stronger electron-phonon coupling in the studied Chevrel phase compared to earlier reports.
Keywords: crystal structure; x-ray diffraction methods; superconductivity; specific heat; DFT calculation
Beteiligte Forschungsanlagen
- Rossendorf Beamline an der ESRF DOI: 10.1107/S1600577520014265
Verknüpfte Publikationen
- DOI: 10.1107/S1600577520014265 is cited by this (Id 26024) publication
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Journal of Physics: Condensed Matter 29(2017), 495603
DOI: 10.1088/1361-648X/aa97fd
Cited 5 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-26024