Strong Pressure Dependence of the Magnetic Penetration Depth in Single Crystals of the Heavy-Fermion Superconductor CeCoIn5 Studied by Muon Spin Rotation

L. Howald; A. Maisuradze; P. Dalmas de Réotier; A. Yaouanc; C. Baines; G. Lapertot; K. Mony; J.-P. Brison; H. Keller

doi:10.1103/PhysRevLett.110.017005

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Strong Pressure Dependence of the Magnetic Penetration Depth in Single Crystals of the Heavy-Fermion Superconductor CeCoIn5 Studied by Muon Spin Rotation

L. Howald, A. Maisuradze, P. Dalmas de Réotier, A. Yaouanc, C. Baines, G. Lapertot, K. Mony, J.-P. Brison, H. Keller

DOI 10.1103/PhysRevLett.110.017005 · Physical Review Letters

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Abstract

In the tetragonal heavy fermion system CeCoIn5 the unconventional superconducting state is probed by means of muon spin rotation. The pressure dependence (0–1 GPa) of the basal-plane magnetic penetration depth (λa), the penetration depth anisotropy (γ=λc/λa) and the temperature dependence of 1/λi2 (i=a, c) were studied in single crystals. A strong decrease of λa with pressure was observed, while γ and λi2(0)/λi2(T) are pressure independent. A linear relationship between 1/λa2(270 mK) and Tc was also found. The large decrease of λa with pressure is the signature of an increase of the number of superconducting quasiparticles by a factor of about 2.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.3	Pressure unresolved	unknown
CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.3	Pressure unresolved	unknown