Superconductivity for CaC6 to 32 GPa hydrostatic pressure

M. Debessai; J. J. Hamlin; J. S. Schilling; D. Rosenmann; D. G. Hinks; H. Claus

doi:10.1103/PhysRevB.82.132502

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Superconductivity for CaC6 to 32 GPa hydrostatic pressure

M. Debessai, J. J. Hamlin, J. S. Schilling, D. Rosenmann, D. G. Hinks, H. Claus

DOI 10.1103/PhysRevB.82.132502 · Physical Review B

T1

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Abstract

The dependence of the superconducting transition temperature Tc of CaC6 has been determined as a function of hydrostatic pressure in both helium-loaded gas and diamond-anvil cells to 0.6 GPa and 32 GPa, respectively. Following an initial increase at the rate +0.39(1) K/GPa, Tc drops abruptly from 15 to 4 K at ∼10 GPa. Between 18 and 32 GPa, no superconducting transition is observed above 2 K.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CaC6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	11.5	Pressure unresolved	midpoint
CaC6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	15	9.5 GPa	midpoint
CaC6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4	11.8 GPa	midpoint