C60: Interacting electrons on a spherical molecule

Ganpathy N. Murthy, Assa Auerbach

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


We study a simplified model of C60, where the electrons move freely on the surface of a sphere. The total energy in the presence of an adjustable repulsive interaction is computed by first- and second-order perturbation theory. The second-order results yield an effective attraction (pair binding) between electrons which are added above a closed angular-momentum shell. For different regimes of interaction parameters, we find an L=0 singlet and an L=1 triplet ground state. Pair binding occurs at larger couplings for longer-range interactions. We estimate the third-order corrections, and define the region where the second-order predictions are expected to hold. The relevance of this model to superconductivity and ferromagnetism in doped fullerenes is discussed.

Original languageEnglish
Pages (from-to)331-341
Number of pages11
JournalPhysical Review B
Issue number1
StatePublished - 1992

ASJC Scopus subject areas

  • Condensed Matter Physics


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