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  Unconventional superconductivity in the cage-type compound Sc5Rh6Sn18

Bhattacharyya, A., Adroja, D. T., Kase, N., Hillier, A. D., Strydom, A. M., & Akimitsu, J. (2018). Unconventional superconductivity in the cage-type compound Sc5Rh6Sn18. Physical Review B, 98(2): 024511, pp. 1-6. doi:10.1103/PhysRevB.98.024511.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E265-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-E268-B
Genre: Journal Article

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Bhattacharyya, A.1, Author
Adroja, D. T.1, Author
Kase, N.1, Author
Hillier, A. D.1, Author
Strydom, A. M.2, Author              
Akimitsu, J.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: We have examined the superconducting ground-state properties of the caged-type compound Sc5Rh6Sn18 using magnetization, heat capacity, and muon-spin relaxation or rotation (mu SR) measurements. Magnetization measurements indicate type-II superconductivity with an upper critical field of mu H-0(c2)(0) = 7.24 T. The zerofield-cooled and field-cooled susceptibility measurements unveil the onset of a diamagnetic signal below T-c = 4.4 K. The interpretation of the heat-capacity results below T-c using the alpha-BCS model unveils the value of alpha = 2.65, which gives thedimensionlessratio 2 Delta(0)/k(B)T(c) = 5.3, intimating that Sc5Rh6Sn18 is a strong-coupling BCS superconductor. The zero-field mu SR measurements in the longitudinal geometry exhibit a signature of the spontaneous appearance of the internal magnetic field below the superconducting transition temperature, indicating that the superconducting state is characterized by the broken time-reversal symmetry (TRS). We have compared the results of broken TRS in Sc5Rh6Sn18 with that observed in R5Rh6Sn18 (R = Lu and Y).

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Language(s): eng - English
 Dates: 2018-07-182018-07-18
 Publication Status: Published in print
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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: 98 (2) Sequence Number: 024511 Start / End Page: 1 - 6 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008