title: Compressibility of M3C60 Fullerene Superconductors: Relation Between Tc and Lattice Parameter.
abstract: X-ray diffraction and diamond anvil techniques were used to measure the isothermal compressibility of K(3)C(60) and Rb(3)C(60), the superconducting, binary alkali-metal intercalation compounds of solid buckminsterfullerene. These results, combined with the pressure dependence of the superconducting onset temperature T(c) measured by other groups, establish a universal first-order relation between T(c) and the lattice parameter a over a broad range, between 13.9 and 14.5 angstroms. A small secondorder intercalate-specific effect was observed that appears to rule out the participation of intercalate-fullerene optic modes in the pairing interaction.
authors.forename: O
authors.initials: O
authors.lastname: Zhou
authors.forename: Q
authors.initials: Q
authors.lastname: Zhu
authors.forename: J E
authors.initials: JE
authors.lastname: Fischer
authors.forename: N
authors.initials: N
authors.lastname: Coustel
authors.forename: G B
authors.initials: GB
authors.lastname: Vaughan
authors.forename: P A
authors.initials: PA
authors.lastname: Heiney
authors.forename: J P
authors.initials: JP
authors.lastname: McCauley
authors.forename: A B
authors.initials: AB
authors.lastname: Smith