A single full gap in noncentrosymmetric superconductor Re6Hf by point-contact spectroscopy

We report a point-contact spectroscopy study on the noncentrosymmetric superconductor Re6Hf with a superconducting transition temperature Tc ∼ 6.0 K. The point-contact conductance spectra can be well fitted by an s-wave Blonder-Tinkham-Klapwijk (BTK) model, where the superconducting gap follows a st...

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Bibliographic Details
Published in:Materials research express 2019-01, Vol.6 (1)
Main Authors: Huang, Qi, Le, Tian, Che, LiQiang, Yin, Lichang, Li, Jie, Yang, Jinhu, Fang, Minghu, Lu, Xin
Format: Article
Language:English
Subjects:
noncentrosymmerty
point-contact spectroscopy
superconducting order parameter
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Summary:We report a point-contact spectroscopy study on the noncentrosymmetric superconductor Re6Hf with a superconducting transition temperature Tc ∼ 6.0 K. The point-contact conductance spectra can be well fitted by an s-wave Blonder-Tinkham-Klapwijk (BTK) model, where the superconducting gap follows a standard BCS behavior as a function of temperature or magnetic field. The gap at 0 K is estimated to be Δ0 ∼ 0.92 meV, yielding 2Δ0/kBTc ∼ 3.56. Hence, our results are consistent with a fully gaped s-wave pairing symmetry with a negligible spin-triplet superconducting component in Re6Hf.
ISSN:2053-1591
DOI:10.1088/2053-1591/aae2eb