Possible evidence for two-gap superconductivity in TiSe_2Cu_x

Details Possible evidence for two-gap superconductivity in TiSe_2Cu_x Possible evidence for two-gap superconductivity in TiSe_2Cu_x

2010-06-08

arxiv.org/abs/1006.1630v1

Phys. Rev. B81, 220505(R) (2010)

Physics

Condensed Matter

Superconductivity

Accepted for publication in PRB

Scientific paper

We report a comprehensive TF-muSR study of TiSe_2Cu_2. The magnetic penetration depth was found to saturate at low temperature as expected in an s-wave SC. As x is increased we find that the superfluid density increases and the size of the superconducting gap, calculated from the temperature dependence of the superfluid density, is approaching the BCS value. However, for low values of x, the gap is smaller than the weak-coupling BCS prediction suggesting that two superconducting gaps are present in the sample.

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