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Time-reversal symmetry breaking and unconventional superconductivity in Zr3Ir: A new type of noncentrosymmetric superconductor

Shang, T., Ghosh, S.K., Chang, L. J., Baines, C, Lee, M.K., Zhao, J.Z., Verezhak, J.A.T., Gawryluk, J., Pomjakushina, E., Shi, M., and others. (2019) Time-reversal symmetry breaking and unconventional superconductivity in Zr3Ir: A new type of noncentrosymmetric superconductor. arXiv.org, . (In press) (KAR id:75639)

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Official URL
https://arxiv.org/abs/1901.01414

Abstract

We report the discovery of a new type of unconventional noncentrosymmetric superconductor, Zr3Ir with Tc=2.2 K, investigated mostly via muon-spin rotation/relaxation (μSR) techniques. Its bulk 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. Our results suggest that Zr3Ir belongs to a new class of materials, suitable for studying the interplay of gauge-, spatial-inversion-, and time-reversal symmetries.

Item Type: Article
Uncontrolled keywords: Physics of Quantum Materials
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: James Burt
Date Deposited: 31 Jul 2019 13:46 UTC
Last Modified: 20 Sep 2020 03:11 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/75639 (The current URI for this page, for reference purposes)
Ghosh, S.K.: https://orcid.org/0000-0002-3646-0629
Quintanilla, Jorge: https://orcid.org/0000-0002-8572-730X
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