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Evidence for the coexistence of time-reversal symmetry breaking and Bardeen-Cooper-Schrieffer-like superconductivity in La7Pd3
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Mayoh, Daniel, Hillier, A. D. (Adrian D.), Balakrishnan, Geetha and Lees, Martin R. (2021) Evidence for the coexistence of time-reversal symmetry breaking and Bardeen-Cooper-Schrieffer-like superconductivity in La7Pd3. Physical Review B (Condensed Matter and Materials Physics), 103 (2). 024507. doi:10.1103/PhysRevB.103.024507
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Official URL: http://dx.doi.org/10.1103/PhysRevB.103.024507
Abstract
Time-reversal symmetry breaking (TRSB) with a Bardeen-Cooper-Schrieffer (BCS) -like superconductivity occurs in a small, but growing number of noncentrosymmetric (NCS) materials, although the mechanism is poorly understood. We present heat capacity, magnetization, resistivity, and muon spin resonance/relaxation (μSR) measurements on polycrystalline samples of NCS La7Pd3. Transverse-field μSR and heat capacity data show La7Pd3 is a type-II superconductor with a BCS-like gap structure, while zero-field μSR results provide evidence of TRSB. We discuss the implications of these results for both the La7X3 (where X = Ni, Pd, Rh, Ir) group of superconductors and other CS and NCS superconductors for which TRSB has been observed.
| Item Type: | Journal Article | ||||||||||
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| Subjects: | Q Science > QC Physics | ||||||||||
| Divisions: | Faculty of Science > Physics | ||||||||||
| Library of Congress Subject Headings (LCSH): | Broken symmetry (Physics), Superconductivity, Polycrystalline semiconductors | ||||||||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||||||
| Publisher: | American Physical Society | ||||||||||
| ISSN: | 1098-0121 | ||||||||||
| Official Date: | 11 January 2021 | ||||||||||
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| Volume: | 103 | ||||||||||
| Number: | 2 | ||||||||||
| Article Number: | 024507 | ||||||||||
| DOI: | 10.1103/PhysRevB.103.024507 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||
| Copyright Holders: | ©2021 American Physical Society | ||||||||||
| RIOXX Funder/Project Grant: |
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