Broken time-reversal symmetry in a new non-centrosymmetric superconductor Re8NbTa

2024/01/15 by R. K. Kushwaha, Kushwaha, R. K., Arushi +18 · 1 citation
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties of Alloys #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.2401.07614

openalex publication_date 2024/01/15 · openalex created_date 2024/01/18 · openalex updated_date 2026/07/28

Abstract

Re-based superconductors provide a rich platform for the study of unconventional superconductivity. We have investigated the superconducting properties of Re₈NbTa, a new noncentrosymmetric cubic (α-Mn structure) rhenium-based ternary superconductor using transport, magnetization, specific heat, and muon spin rotation/relaxation (μSR) measurements. Specific heat and transverse field μSR measurements suggest moderately coupled fully gapped superconductivity, well described by BCS theory. However, our zero-field μSR measurements reveal a small internal field onsetting around the superconducting T_c, indicating that the superconducting order parameter breaks the time-reversal symmetry.

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