Superconductivity at 8 K in samarium-doped C60

X. H. Chen; G. Roth

doi:10.1103/PhysRevB.52.15534

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Superconductivity at 8 K in samarium-doped C60

X. H. Chen, G. Roth

DOI 10.1103/PhysRevB.52.15534 · Physical Review B

T1

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Abstract

We have synthesized the fulleride system SmxC60 (x<3). It is found that Sm can be intercalated into interstitial sites of C60 to form a solid solution. For the nominal composition x=3, the sample shows superconductivity at Tc=8 K. X-ray diffraction reveals an orthorhombic structure with a=28.17(5) Å, b=28.07(3) Å, and c=28.27(3) Å, derived from the face-centered cubic cell of A3C60 by doubling in each direction and analogous to that of Yb2.75C60. The lattice parameters of Sm-doped C60 are significantly larger than those of Yb-doped C60 and the superconducting transition temperature of Sm3C60 is 2 K higher than that of Yb2.75C60.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sm3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8	Pressure not reported	onset
Yb2.75C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6	Pressure not reported	unknown