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  CoBi3-the first binary compound of cobalt with bismuth: high-pressure synthesis and superconductivity

Tence, S., Janson, O., Krellner, C., Rosner, H., Schwarz, U., Grin, Y., et al. (2014). CoBi3-the first binary compound of cobalt with bismuth: high-pressure synthesis and superconductivity. Journal of Physics: Condensed Matter, 26(39): 395701, pp. 1-6. doi:10.1088/0953-8984/26/39/395701.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-348D-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-6626-6
Genre: Journal Article

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 Creators:
Tence, S.1, Author
Janson, O.1, Author
Krellner, C.1, Author
Rosner, H.2, Author              
Schwarz, U.3, Author              
Grin, Y.4, Author              
Steglich, F.5, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Helge Rosner, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863450              
3Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863423              
4Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              
5Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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 Abstract: The first compound in the cobalt bismuth system was synthesized by high-pressure high-temperature synthesis at 5 GPa and 450 degrees C. CoBi3 crystallizes in space group Pnma (no. 62) with lattice parameters of a = 8.8464(7) angstrom, b = 4.0697(4) angstrom and c = 11.5604(9) angstrom adopting a NiBi3-type crystal structure. CoBi3 undergoes a superconducting transition at T-c = 0.48(3) K as evidenced by electrical-resistivity and specific-heat measurements. Based on the anomaly of the specific heat at Tc and considering the estimated electron-phonon coupling, the new Bi-rich compound can be classified as a Bardeen-Cooper-Schrieffer-type superconductor with weak electron-phonon coupling. Density-functional theory calculations disclose a sizable influence of the spin-orbit coupling to the valence states and proximity to a magnetic instability, which accounts for a significantly enhanced Sommerfeld coefficient.

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Language(s): eng - English
 Dates: 20142014-09-10
 Publication Status: Published in print
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 Table of Contents: -
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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: 26 (39) Sequence Number: 395701 Start / End Page: 1 - 6 Identifier: ISSN: 0953-8984
CoNE: /journals/resource/954928562478