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Detection of time-reversal symmetry breaking in the noncentrosymmetric superconductor Re6Zr using muon-spin spectroscopy
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Singh, R. P., Hillier, A. D. (Adrian D.), Mazidian, B., Quintanilla, J., Annett, J. F., Paul, Don McK., Balakrishnan, Geetha and Lees, Martin R. (2014) Detection of time-reversal symmetry breaking in the noncentrosymmetric superconductor Re6Zr using muon-spin spectroscopy. Physical Review Letters, 112 (10). 107002. doi:10.1103/PhysRevLett.112.107002 ISSN 0031-9007.
An open access version can be found in:
Official URL: http://dx.doi.org/10.1103/PhysRevLett.112.107002
Abstract
We have investigated the superconducting state of the noncentrosymmetric compound Re6Zr using magnetization, heat capacity, and muon-spin relaxation or rotation (μSR) measurements. Re6Zr has a superconducting transition temperature, Tc=6.75±0.05 K. Transverse-field μSR experiments, used to probe the superfluid density, suggest an s-wave character for the superconducting gap. However, zero and longitudinal-field μSR data reveal the presence of spontaneous static magnetic fields below Tc indicating that time-reversal symmetry is broken in the superconducting state and an unconventional pairing mechanism. An analysis of the pairing symmetries identifies the ground states compatible with time-reversal symmetry breaking.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 13 March 2014 | ||||
Dates: |
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Volume: | 112 | ||||
Number: | 10 | ||||
Article Number: | 107002 | ||||
DOI: | 10.1103/PhysRevLett.112.107002 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Open Access Version: |
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