Superfluid density in gapless superconductor CeCoIn5

V. G. Kogan; R. Prozorov; C. Petrovic

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arXiv · 0712.1632

Superfluid density in gapless superconductor CeCoIn5

V. G. Kogan·R. Prozorov·C. Petrovic

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Abstract

Temperature dependence of the London penetration depth $λ$ measured in single crystals of CeCoIn$_5$ is interpreted as caused by a strong pair-breaking scattering that makes the superconductivity in this compound gapless. For a gapless d-wave superconductor, we derive $λ=λ_0/\sqrt{1-(T/T_c)^2}$ caused by combined effect of magnetic and non-magnetic scattering in excellent agreement with the data in the full temperature range and with the gapless s-wave case of Abrikosov and Gor'kov. We also obtain the slope of the upper critical field at $T_c$ that compares well with the measured slope.

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V. G. Kogan, R. Prozorov, C. Petrovic. 2007-12-11. Superfluid density in gapless superconductor CeCoIn5. https://arxiv.org/abs/0712.1632

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