Benfenati, A, Barkman, M, Winyard, T orcid.org/0000-0002-7923-5739 et al. (3 more authors) (2020) Magnetic signatures of domain walls in s+is and s+id superconductors: Observability and what that can tell us about the superconducting order parameter. Physical Review B, 101 (5). 054507. ISSN 2469-9950
Abstract
One of the defining features of spontaneously broken time-reversal symmetry (BTRS) is the existence of domain walls, the detection of which would be strong evidence for such systems. There is keen interest in BTRS currently, in part, due to recent muon spin rotation experiments, which have pointed towards Ba1−xKxFe2As2 exhibiting a remarkable case of s-wave superconductivity with spontaneously broken time-reversal symmetry. A key question, however, is how to differentiate between the different theoretical models which describe such a state. Two particularly popular choices of model are s+is and s+id superconducting states. In this paper, we obtain solutions for domain walls in s+is and s+id systems, including the effects of lattice anisotropies. We show that, in general, both models exhibit spontaneous magnetic fields that extend along the entire length of the domain wall. We demonstrate the qualitative difference between the magnetic signatures of s+is and s+id domain walls and propose a procedure to extract the superconducting pairing symmetry from the magnetic-field response of domain walls.
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Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (CC BY 4.0) (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by Bibsam. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Pure Mathematics (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/P024688/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 03 Jun 2020 11:21 |
Last Modified: | 25 Jun 2023 22:17 |
Status: | Published |
Publisher: | American Physical Society |
Identification Number: | 10.1103/physrevb.101.054507 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:161409 |