Muon spin rotation study of the magnetic penetration depth in the intercalated graphite superconductor CaC{sub 6}.

Journal Article · Mon Jul 26 00:00:00 EDT 2010 · Phys. Rev. B

DOI:https://doi.org/10.1103/PhysRevB.82.014530· OSTI ID:993392

Di Castro, D; Kanigel, A; Maisuradze, A; Keren, A; Postorino, P; Rosenmann, D; Welp, U; Karapetrov, G; Claus, H; Hinks, D G; Amato, A; Campuzano, J C

We report temperature- and magnetic field-dependent bulk muon spin rotation measurements in a c-axis-oriented superconductor CaC{sub 6} 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}{sub 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{sub B}T{sub c} = 3.6(1), suggesting that CaC{sub 6} is a fully gapped BCS superconductor in the clean limit regime.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 993392
• Report Number(s): ANL/MSD/JA-67898; TRN: US1008011
• Journal Information: Phys. Rev. B, Vol. 82, Issue Jul. 26, 2010
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
GRAPHITE
MIXED STATE
MUON SPIN RELAXATION
PENETRATION DEPTH
SUPERCONDUCTORS