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

Lancaster, T. (Durham University, UK); Huddart, B. M. (Durham University, UK); Onuorah, I. J. (University of Parma, Italy); Blundell, S. J. (University of Oxford, UK); De Renzi, R. (University of Parma, Italy); Bonfà, P. (University of Parma, Italy); Isah, M. M. (University of Parma, Italy); Clark, S. J. (Durham University, UK)

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Intrinsic nature of spontaneous magnetic fields in superconductors with time-reversal symmetry breaking [dataset] Open Access

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 Sr 2 RuO 4 . 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.

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Resource type: Dataset
Contributors: Creator: Huddart, B. M. ¹
Onuorah, I. J. ²
Isah, M. M. ²
Bonfà, P. ²
Blundell, S. J. ³
Clark, S. J. ¹
De Renzi, R. ²
Creator: Lancaster, T. ¹

¹ Durham University, UK
² University of Parma, Italy
³ University of Oxford, UK
Funder: Engineering and Physical Sciences Research Council
CINECA
Supercomputing Unified Platform - Emilia-Romagna
Science and Technology Facilities Council
Research methods
Other description
Keyword: Muon spin relaxation & rotation
Density functional theory
Superconductivity
Unconventional superconductors
Subject
Location
Language: English
Cited in: doi:10.1103/PhysRevLett.127.237002
Identifier: ark:/32150/r2x059c7349
doi:10.15128/r2x059c7349
Rights: Creative Commons Attribution 4.0 International (CC BY)
Publisher: Durham University
Date Created

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