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Superconductivity in Ru0.55Rh0.45P and Ru0.75Rh0.25 As probed by muon spin relaxation and rotation measurements

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Anand, V. K., Adroja, D. T., Lees, Martin R., Biswas, P. K., Hillier, A. D. and Lake, B. (2018) Superconductivity in Ru0.55Rh0.45P and Ru0.75Rh0.25 As probed by muon spin relaxation and rotation measurements. Physical Review B, 98 (21). 214517. doi:10.1103/PhysRevB.98.214517

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Official URL: http://dx.doi.org/10.1103/PhysRevB.98.214517

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Abstract

Superconductivity in the pseudobinary pnictides Ru0.55Rh0.45P and Ru0.75Rh0.25As is probed by muon spin relaxation and rotation (μSR) measurements in conjunction with magnetic susceptibility, heat capacity, and electrical resistivity measurements. Powder x-ray diffraction confirmed the MnP-type orthorhombic structure (space group Pnma) and showed a nearly single phase nature with small impurity phase(s) of about 5% for both the samples. The occurrence of bulk superconductivity is confirmed with Tc = 3.7 K for Ru0.55Rh0.45P and Tc = 1.6 K for Ru0.75Rh0.25As. The superconducting state electronic heat capacity data reveal weak-coupling single-band isotropic s-wave gap BCS superconductivity. Various normal and superconducting state parameters are determined which reveal a weak-coupling electron-phonon driven type-II dirty-limit superconductivity for both the compounds. The upper critical field shows a linear temperature dependence down to the lowest measured temperatures which is quite unusual for a single-band superconductor. The μSR data confirm the conventional type-II behavior and show evidence for a single-band s-wave singlet pairing superconductivity with a preserved time reversal symmetry for both the compounds.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Superconductivity, Muon spin rotation
Journal or Publication Title: Physical Review B
Publisher: American Physical Society
ISSN: 2469-9950
Official Date: 26 December 2018
Dates:
DateEvent
26 December 2018Published
26 December 2018Accepted
14 August 2018Submitted
Volume: 98
Number: 21
Article Number: 214517
DOI: 10.1103/PhysRevB.98.214517
Status: Peer Reviewed
Publication Status: Published
Publisher Statement: © 2018 American Physical Society
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: American Physical Society
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDHelmholtz-Gemeinschafthttp://dx.doi.org/10.13039/501100001656

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