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  Two-gap superconductivity in Ag1-xMo6S8 Chevrel phase

Feig, M., Bobnar, M., Veremchuk, I., Hennig, C., Burkhardt, U., Starke, R., et al. (2017). Two-gap superconductivity in Ag1-xMo6S8 Chevrel phase. Journal of Physics: Condensed Matter, 29(49): 495603, pp. 1-9. doi:10.1088/1361-648X/aa97fd.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-9804-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-980C-7
Genre: Journal Article

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 Creators:
Feig, Manuel1, Author              
Bobnar, Matej1, Author              
Veremchuk, Igor2, Author              
Hennig, Christoph3, Author
Burkhardt, Ulrich4, Author              
Starke, Ronald3, Author
Kundys, Bohdan3, Author
Leithe-Jasper, Andreas5, Author              
Gumeniuk, Roman3, Author
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Igor Veremchuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863411              
3External Organizations, ou_persistent22              
4Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863422              
5Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              

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 Abstract: The superconducting properties of Ag1-xMo6S8 [x = 0.08(1)] Chevrel phase [T-c = 7.9(5) K] are studied on a sample compacted by spark plasma sintering. Both lower (B-c1 = 12(1) mT) and the upper [B-c2(0) approximate to 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. Similar to MgB2, the Fermi surface of studied Chevrel phase is formed by two hole-like and one electron-like bands.

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Language(s): eng - English
 Dates: 2017-11-172017-11-17
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1088/1361-648X/aa97fd
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Title: Journal of Physics: Condensed Matter
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 29 (49) Sequence Number: 495603 Start / End Page: 1 - 9 Identifier: ISSN: 0953-8984
CoNE: /journals/resource/954928562478