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  Noncentrosymmetric superconductor BeAu

Amon, A., Svanidze, E., Cardoso-Gil, R., Wilson, M. N., Rosner, H., Bobnar, M., et al. (2018). Noncentrosymmetric superconductor BeAu. Physical Review B, 97(1): 014501, pp. 1-11. doi:10.1103/PhysRevB.97.014501.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-3900-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-395E-8
Genre: Journal Article

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 Creators:
Amon, A.1, Author              
Svanidze, E.1, Author              
Cardoso-Gil, R.2, Author              
Wilson, M. N.3, Author
Rosner, H.4, Author              
Bobnar, M.1, Author              
Schnelle, W.5, Author              
Lynn, J. W.3, Author
Gumeniuk, R.3, Author
Hennig, C.3, Author
Luke, G. M.3, Author
Borrmann, H.6, Author              
Leithe-Jasper, A.7, Author              
Grin, Yu.8, Author              
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Raul Cardoso, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863420              
3External Organizations, ou_persistent22              
4Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
5Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
6Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863410              
7Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              
8Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              

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 Abstract: Mixed spin-singlet and spin-triplet pairing can occur in noncentrosymmetric superconductors. In this respect, a comprehensive characterization of the noncentrosymmetric superconductor BeAu was carried out. It was established that BeAu undergoes a structural phase transition from a low-temperature noncentrosymmetric FeSi structure type to a high-temperature centrosymmetric structure in the CsCl type at T-s = 860 K. The low-temperature modification exhibits a superconducting transition below T-c = 3.3 K. The values of lower (H-c1 = 32 Oe) and upper (H-c2 = 335 Oe) critical fields are rather small, confirming that this type-II (kappa(G-L) = 2.3) weakly coupled (lambda(e-p) = 0.5, Delta C-e/gamma T-n(c) approximate to 1.26) superconductor can be well understood within the Bardeen-Cooper-Schrieffer theory. The muon spin relaxation analysis indicates that the time-reversal symmetry is preserved when the superconducting state is entered, supporting conventional superconductivity in BeAu. From the density functional band structure calculations, a considerable contribution of the Be electrons to the superconducting state was established. On average, a rather small mass renormalization was found, consistent with the experimental data.

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Language(s): eng - English
 Dates: 2018-01-042018-01-04
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevB.97.014501
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 97 (1) Sequence Number: 014501 Start / End Page: 1 - 11 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008