s-Wave superconductivity in non-centrosymmetric Re_3W probed by magnetic penetration depth

Details s-Wave superconductivity in non-centrosymmetric Re_3W probed by magnetic penetration depth s-Wave superconductivity in non-centrosymmetric Re_3W probed by magnetic penetration depth

2007-07-12

arxiv.org/abs/0707.1905v1

Physics

Condensed Matter

Superconductivity

4 figures

Scientific paper

We report measurements of the temperature dependence of the magnetic penetration depth \lambda(T) in non-centrosymmetric superconductor Re_3W. We employed two experimental techniques: extraction of \lambda(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 $\Delta(0)/k_BT_C=1.76$. No evidence for unconventional pairing resulting from the absence of the inversion symmetry is found.

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