s-Wave superconductivity in non-centrosymmetric Re₃W probed by magnetic penetration depth

2007/07/12 by Zuev, Y. L., Kuznetsova, V. A., Prozorov, R. +4
#FOS: Physical sciences #Superconductivity (cond-mat.supr-con)

paper · doi:10.48550/arxiv.0707.1905

Abstract

We report measurements of the temperature dependence of the magnetic penetration depth λ(T) in non-centrosymmetric superconductor Re₃W. We employed two experimental techniques: extraction of λ(T) from magnetic \em dc-susceptibility, measured on a powder sample, and the rf tunnel diode resonator technique, where a bulk polycrystalline sample was used. The results of both techniques agree: the temperature dependence of the penetration depth can be well described by weak-coupling, dirty-limit, s-wave BCS theory where we obtain Δ(0)/k_BT_C=1.76. No evidence for unconventional pairing resulting from the absence of the inversion symmetry is found.

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