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Singlet-triplet mixing in the order parameter of the noncentrosymmetric superconductor Ru7B3

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Cameron, A. S., Yerin, Y. S., Tymoshenko, Y. V., Portnichenko, P. Y., Sukhanov, A. S., Hatnean, M. Ciomaga, Paul, D. McK., Balakrishnan, Geetha, Cubitt, R., Heinemann, A. and Inosov, D. S. (2022) Singlet-triplet mixing in the order parameter of the noncentrosymmetric superconductor Ru7B3. Physical Review B, 105 (9). 094519. doi:10.1103/PhysRevB.105.094519 ISSN 2469-9950.

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Official URL: https://doi.org/10.1103/PhysRevB.105.094519

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Abstract

One of the key effects which is predicted to arise in superconductors without a center of inversion is the mixing of singlet and triplet order parameters, which are no longer good quantum numbers on their own due to parity.We have probed the gap structure in the noncentrosymmetric superconductor Ru7B3, through small-angle neutron diffraction from the vortex lattice, in order to search for the proposed mixed order parameter. We find that the measured temperature dependence of the vortex-lattice form factor is well characterized by a model constructed to describe the effects of broken inversion symmetry on the superconducting state, indicating the presence of a mixed singlet-triplet gap and confirming the theoretical predictions.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Superconductors, Quantum theory, Electrons
Journal or Publication Title: Physical Review B
Publisher: American Physical Society
ISSN: 2469-9950
Official Date: 29 March 2022
Dates:
DateEvent
29 March 2022Published
22 February 2022Accepted
8 February 2022Modified
17 August 2021Submitted
Volume: 105
Number: 9
Article Number: 094519
DOI: 10.1103/PhysRevB.105.094519
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: 6 April 2022
Date of first compliant Open Access: 7 April 2022
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
IN 209/3-2[DFG] Deutsche Forschungsgemeinschafthttp://dx.doi.org/10.13039/501100001659
IN 209/6-1[DFG] Deutsche Forschungsgemeinschafthttp://dx.doi.org/10.13039/501100001659
GRK 1621[DFG] Deutsche Forschungsgemeinschafthttp://dx.doi.org/10.13039/501100001659
05K16OD2Bundesministerium für Bildung und Forschunghttp://dx.doi.org/10.13039/501100002347
05K19OD1Bundesministerium für Bildung und Forschunghttp://dx.doi.org/10.13039/501100002347
EP/M028771/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
EP/T005963/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
UNSPECIFIEDInternational Max Planck Research School for Chemistry and Physics of Quantum Materialshttps://imprs-cpqm.mpg.de/

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