Detection of time-reversal symmetry breaking in the noncentrosymmetric superconductor Re6Zr using muon-spin spectroscopy.
作者： R. P. Singh , A. D. Hillier , B. Mazidian , J. Quintanilla , J. F. Annett
DOI: 10.1103/PHYSREVLETT.112.107002
关键词:
摘要: We have investigated the superconducting state of noncentrosymmetric compound Re6Zr using magnetization, heat capacity, and muon-spin relaxation or rotation (μSR) measurements. has a transition temperature, Tc=6.75±0.05 K. Transverse-field μSR experiments, used to probe superfluid density, suggest an s-wave character for gap. However, zero longitudinal-field data reveal presence spontaneous static magnetic fields below Tc indicating that time-reversal symmetry is broken in unconventional pairing mechanism. An analysis symmetries identifies ground states compatible with breaking.
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