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  Conventional isotropic s-wave superconductivity with strong electron-phonon coupling in Sc5Rh6Sn18

Feig, M., Schnelle, W., Maisuradze, A., Amon, A., Baines, C., Nicklas, M., et al. (2020). Conventional isotropic s-wave superconductivity with strong electron-phonon coupling in Sc5Rh6Sn18. Physical Review B, 102(2): 024508, pp. 1-8. doi:10.1103/PhysRevB.102.024508.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-BDDC-E Version Permalink: http://hdl.handle.net/21.11116/0000-0006-BDDE-C
Genre: Journal Article

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 Creators:
Feig, Manuel1, Author              
Schnelle, Walter2, Author              
Maisuradze, Alexander3, Author
Amon, Alfred1, Author              
Baines, Christopher3, Author
Nicklas, Michael4, Author              
Seiro, Silvia3, Author
Howald, Ludovic3, Author
Khasanov, Rustem3, 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              
2Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
3External Organizations, ou_persistent22              
4Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863472              
5Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              

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 Abstract: Sc5Rh6Sn18 is a diamagnetic metallic compound (space group: I4(1)/acd, a approximate to 13.5 angstrom, c approximate to 27.1 angstrom) which becomes superconducting (sc) at T-c = 5.15 K. The sc state was studied on single-crystal samples by temperature-and field-dependent electrical resistivity, specific heat, and muon-spin rotation (mu SR) spectroscopy. No anisotropy of the upper critical field B-c2 = 7.75 T is observed. Analyses of specific heat indicate enhanced values of the jump [Delta(cp)/(gamma(tot) = 1.58] and of the energy gap ratio [Delta(0)/(k(B)T(c)) = 2.39] as well as an exponential decrease of the electronic contribution below T-c/2. Together with the saturation of the superfluid density for T < 3 K observed by mu SR spectroscopy these findings lead us to classify Sc5Rh6Sn18 as a moderately strong coupled isotropic s-wave superconductor. However, above T-c, the crystals reveal a surprisingly anisotropic and large resistivity of 2.5-4.5 m Omega m with metalliclike behavior perpendicular to the c axis and by a factor of similar to 2 larger parallel to c, which decreases upon increasing temperature. These observations are discussed in connection to a characteristic intrinsic disorder in the crystal structure ofSc(5)Rh(6)Sn(18).

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Language(s): eng - English
 Dates: 2020-07-072020-07-07
 Publication Status: Published in print
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 Table of Contents: -
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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: 102 (2) Sequence Number: 024508 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008