Shang, T., Ghosh, S.K., Zhao, J.Z., Chang, L.J., Baines, C., Lee, M.K., Gawryluk, D.J., Shi, M., Medarde, M., Quintanilla, Jorge, and others. (2020) Time-reversal symmetry breaking in the noncentrosymmetric Zr3Ir superconductor. Physical Review B, 102 . Article Number 020503. ISSN 2469-9950. E-ISSN 2469-9969. (doi:10.1103/PhysRevB.102.020503) (KAR id:82161)
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Official URL: https://doi.org/10.1103/PhysRevB.102.020503 |
Abstract
We report the discovery of Zr3Ir as a structurally different type of unconventional noncentrosymmetric superconductor (with Tc=2.3 K), here investigated mostly via muon-spin rotation/relaxation (μSR) techniques. Its superconductivity was characterized using magnetic susceptibility, electrical resistivity, and heat capacity measurements. The low-temperature superfluid density, determined via transverse-field μSR and electronic specific heat, suggests a fully gapped superconducting state. The spontaneous magnetic fields, revealed by zero-field μSR below Tc, indicate the breaking of time-reversal symmetry in Zr3Ir and hence the unconventional nature of its superconductivity. By using symmetry arguments and electronic-structure calculations we obtain a superconducting order parameter that is fully compatible with the experimental observations. Hence, our results clearly suggest that Zr3Ir represents a structurally different member of noncentrosymmetric superconductors with broken time-reversal symmetry.
Item Type: | Article |
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DOI/Identification number: | 10.1103/PhysRevB.102.020503 |
Uncontrolled keywords: | Physics of Quantum Materials, superconductivity, noncentrosymmetric materials, unconventional superconductors, muon spin relaxation & rotation, symmetry in physics |
Subjects: |
Q Science > QC Physics > QC173.45 Condensed Matter Q Science Q Science > QC Physics |
Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
Funders: |
[37325] UNSPECIFIED
[37325] UNSPECIFIED |
Depositing User: | Jorge Quintanilla Tizon |
Date Deposited: | 20 Jul 2020 11:34 UTC |
Last Modified: | 04 Mar 2024 15:40 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/82161 (The current URI for this page, for reference purposes) |
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