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Intrinsic nature of spontaneous magnetic fields in superconductors with time-reversal symmetry breaking

Huddart, B.M.; Onuorah, I.J.; Isah, M.M.; Bonfa, P.; Blundell, S.J.; Clark, S.J.; De Renzi, R.; Lancaster, T

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Authors

I.J. Onuorah

M.M. Isah

P. Bonfa

S.J. Blundell

R. De Renzi



Abstract

We present a systematic investigation of muon-stopping states in superconductors that reportedly exhibit spontaneous magnetic fields below their transition temperatures due to time-reversal symmetry breaking. These materials include elemental rhenium, several intermetallic systems and Sr2RuO4. We demonstrate that the presence of the muon leads to only a limited and relatively localized perturbation to the local crystal structure, while any small changes to the electronic structure occur several electron volts below the Fermi energy leading to only minimal changes in the charge density on ions close to the muon. Our results imply that the muon-induced perturbation alone is unlikely to lead to the observed spontaneous fields in these materials, whose origin is more likely intrinsic to the time-reversal symmetry broken superconducting state.

Citation

Huddart, B., Onuorah, I., Isah, M., Bonfa, P., Blundell, S., Clark, S., …Lancaster, T. (2021). Intrinsic nature of spontaneous magnetic fields in superconductors with time-reversal symmetry breaking. Physical Review Letters, 127(23), Article 237002. https://doi.org/10.1103/physrevlett.127.237002

Journal Article Type Article
Acceptance Date Oct 27, 2021
Online Publication Date Dec 1, 2021
Publication Date Dec 3, 2021
Deposit Date Oct 27, 2021
Publicly Available Date Oct 28, 2021
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 127
Issue 23
Article Number 237002
DOI https://doi.org/10.1103/physrevlett.127.237002
Related Public URLs arXiv:2105.13956

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Copyright Statement
Reprinted with permission from the American Physical Society: Huddart, B.M., Onuorah, I. J. Isah, M. M. Bonfa, P. Blundell, S. J. Clark, S. J., De Renzi, R. & Lancaster, T (2021). Intrinsic nature of spontaneous magnetic fields in superconductors with time-reversal symmetry breaking. Physical Review Letters 127(23): 237002. ​© (2021) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.





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