Near constancy of the pressure dependence of Tc across families of organic and fullerene superconductors

Vincent H. Crespi; Marvin L. Cohen

doi:10.1103/PhysRevB.53.56

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Near constancy of the pressure dependence of Tc across families of organic and fullerene superconductors

Vincent H. Crespi, Marvin L. Cohen

DOI 10.1103/PhysRevB.53.56 · Physical Review B

T1

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Abstract

Pressure strongly depresses the superconducting transition temperature Tc of both the doped fullerenes and the β-ET[(BEDT-TTF)nXm, (BEDT-TTF)=bis(ethylenedithio)tetrathiofulvalene)] organic superconductors. An outstanding puzzle in these materials is the weak variation dTc/dP across families of compounds with large variations in Tc. This property has been used to argue against phonon-induced pairing. However, closer examination of the volume dependence of Tc reveals that the weak variation of dTc/dP is consistent with moderate (but not weak) electron-phonon coupling. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Na2RbC60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	4	Pressure not reported	unknown