Interactions, pair binding and ferromagnetism on spherical molecules

A. Auerbach, G. N. Murthy

Research output: Contribution to journalLetterpeer-review

10 Scopus citations


The energy of a system of electrons on a sphere with purely repulsive interactions is computed by perturbation theory. Second-order results yield an effective attraction between added electrons, in the L = 0 singlet state or in the L = 1 triplet state, which depends on the magnitude and range of the interaction. An estimate of third-order corrections bounds the regime where these predictions are expected to hold. We discuss the relevance of this model to superconductivity and ferromagnetism in doped fullerenes.

Original languageEnglish
Pages (from-to)103-108
Number of pages6
JournalEurophysics Letters
Issue number2
StatePublished - May 15 1992

ASJC Scopus subject areas

  • Physics and Astronomy (all)


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