We report temperature-and magnetic field-dependent bulk muon spin rotation measurements in a c-axis-oriented superconductor CaC6 in the mixed state. Using both a simple second-moment analysis and the more precise analytical Ginzburg-Landau model, we obtained a field-independent in-plane magnetic penetration depth lambda(ab)(0) = 72(3) nm. The temperature dependencies of the normalized muon spin relaxation rate and of the normalized superfluid density result to be identical and both are well represented by the clean limit BCS model with 2 Delta/k(B)T(c)=3.6(1), suggesting that CaC6 is a fully gapped BCS superconductor in the clean limit regime.

Muon spin rotation study of the magnetic penetration depth in the intercalated graphite superconductor CaC6 / DI CASTRO, Daniele; A., Kanigel; A., Maisuradze; A., Keren; Postorino, Paolo; D., Rosenmann; U., Welp; G., Karapetrov; H., Claus; D. G., Hinks; A., Amato; J. C., Campuzano. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 82:1(2010), pp. 014530-1-014530-6. [10.1103/physrevb.82.014530]

Muon spin rotation study of the magnetic penetration depth in the intercalated graphite superconductor CaC6

DI CASTRO, Daniele;POSTORINO, Paolo;
2010

Abstract

We report temperature-and magnetic field-dependent bulk muon spin rotation measurements in a c-axis-oriented superconductor CaC6 in the mixed state. Using both a simple second-moment analysis and the more precise analytical Ginzburg-Landau model, we obtained a field-independent in-plane magnetic penetration depth lambda(ab)(0) = 72(3) nm. The temperature dependencies of the normalized muon spin relaxation rate and of the normalized superfluid density result to be identical and both are well represented by the clean limit BCS model with 2 Delta/k(B)T(c)=3.6(1), suggesting that CaC6 is a fully gapped BCS superconductor in the clean limit regime.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/364858
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