Bhattacharyya, A., Lees, M. R., Panda, K., Ferreira, P. P., Dorini, T. T., Gaudry, Emilie, Eleno, L. T. F., Anand, V. K., Sannigrahi, J., Biswas, P. K., Tripathi, R. and Adroja, D. T. (2022) Nodeless time-reversal symmetry breaking in the centrosymmetric superconductor Sc5Co4Si10 probed by muon-spin spectroscopy. Physical Review Materials, 6 (6). 064802. doi:10.1103/PhysRevMaterials.6.064802 ISSN 2475-9953.

Preview

PDF WRAP-Nodeless-time-reversal-symmetry-breaking-in-the-centrosymmetric-superconductor-Sc5Co4Si10-probed-by-muon-spin-spectroscopy-Lees-22.pdf - Published Version - Requires a PDF viewer. Download (2426Kb) | Preview

Request Changes to record.

Abstract

We investigate the superconducting properties of Sc5Co4Si10 using low-temperature resistivity, magnetization, heat capacity, and muon-spin rotation and relaxation (μSR) measurements. We find that Sc5Co4Si10 exhibits type-II superconductivity with a superconducting transition temperature TC = 3.5(1) K. The temperature dependence of the superfluid density obtained from transverse-field μSR spectra is best modeled using an isotropic Bardeen-Cooper-Schrieffer type s-wave gap symmetry with 2Δ/kBTC = 2.84(2). However, the zero-field muonspin relaxation rate reveals the appearance of a spontaneous magnetic field below TC, indicating that time-reversal symmetry (TRS) is broken in the superconducting state. Although this behavior is commonly associated with nonunitary or mixed singlet-triplet pairing, our group-theoretical analysis of the Ginzburg-Landau free energy alongside density functional theory calculations indicates that unconventional mechanisms are pretty unlikely. Therefore, we have hypothesized that TRS breaking may occur via a conventional electron-phonon process.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Rare earths , Rare earths -- Magnetic properties, Superconductivity, Superconductors, Type II , Muon spin rotation , Electron-phonon interactions
Journal or Publication Title:	Physical Review Materials
Publisher:	American Physical Society
ISSN:	2475-9953
Official Date:	15 June 2022
Dates:	Date Event 15 June 2022 Published 18 May 2022 Accepted 28 February 2022 Submitted
Volume:	6
Number:	6
Article Number:	064802
DOI:	10.1103/PhysRevMaterials.6.064802
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Copyright Holders:	American Physical Society
Date of first compliant deposit:	27 June 2022
Date of first compliant Open Access:	28 June 2022
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID CRG/2020/000698 Science and Engineering Research Board http://dx.doi.org/10.13039/501100001843 EP/W00562X/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 UNSPECIFIED [JSPS] Japan Society for the Promotion of Science http://dx.doi.org/10.13039/501100001691 IF170620 India. Department of Science and Technology http://viaf.org/viaf/139476328 001 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior http://dx.doi.org/10.13039/501100002322 2019/05005-7 Fundação de Amparo à Pesquisa do Estado de São Paulo http://dx.doi.org/10.13039/501100001807 2020/08258-0 Fundação de Amparo à Pesquisa do Estado de São Paulo http://dx.doi.org/10.13039/501100001807
Open Access Version:	ArXiv

Request changes or add full text files to a record

Repository staff actions (login required)

View Item

Downloads