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Multigap superconductivity in chiral noncentrosymmetric TaRh2B2

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Mayoh, Daniel, Hillier, A. D., Gotze, Kathrin, Paul, Don McK., Balakrishnan, Geetha and Lees, Martin R. (2018) Multigap superconductivity in chiral noncentrosymmetric TaRh2B2. Physical Review B (Condensed Matter and Materials Physics), 98 (1). 014502. doi:10.1103/PhysRevB.98.014502

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Official URL: http://dx.doi.org/10.1103/PhysRevB.98.014502

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Abstract

We report the observation of multigap superconductivity in TaRh2B2. We show TaRh2 B2 is a bulk type-II superconductor with a transition temperature Tc = 6.00(5) K. We present transverse-field muon spin relaxation data where the superconducting gap can be fit using a two-gap (s + s)-wave model.We also report the zero-field electronic specific heat in the superconducting state that is best described by the same (s + s) model, providing further evidence of multiband behavior in this superconductor. Zero-field muon spin relaxation measurements show time-reversal symmetry is preserved in the superconducting state. We demonstrate that TaRh2B2 has an upper critical field of 15.2(1) T, which is significantly higher than previously reported and exceeds the Pauli limit.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Superconductors, Superconductors, Type II, Muon spin rotation, Superconductivity
Journal or Publication Title: Physical Review B (Condensed Matter and Materials Physics)
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: 5 July 2018
Dates:
DateEvent
5 July 2018Published
5 July 2018Accepted
19 June 2018Modified
18 April 2018Submitted
Volume: 98
Number: 1
Page Range: 014502
DOI: 10.1103/PhysRevB.98.014502
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: American Physical Society
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/M028771/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
681260H2020 Excellent Sciencehttp://dx.doi.org/10.13039/100010662

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