Isotopic disorder and the electronic pairing mechanism in superconducting fullerenes

P. E. Lammert; D. S. Rokhsar

doi:10.1103/PhysRevB.48.1310

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Isotopic disorder and the electronic pairing mechanism in superconducting fullerenes

P. E. Lammert, D. S. Rokhsar

DOI 10.1103/PhysRevB.48.1310 · Physical Review B

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Abstract

We examine the effects of isotopic disorder on the shift of Tc in the superconducting fullerenes within the electronic pairing mechanism of Chakravarty et al. Isotopic disorder leads to anisotropic changes in electronic hopping on an individual fullerene molecule, which in turn slightly alters the pair binding energy on that molecule. While isotopic disorder does tend to suppress Tc within this model, we find that these effects are too small to account for anomalous isotope shifts reported for partial C13 substitution.

Source-reported materials — not catalogue approval

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