Orbital pairing effects in fullerenes

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Abstract

We propose a theory of superconductivity for a crystal having multiple band structure. The theory is valid for the parameter δ(kF)/h{combining short stroke overlay}ω≪1 when the splitting between bands δ(kF) is small in comparison with the phonon frequency h{combining short stroke overlay}ω. The theory may be applicable to the doped fullerenes where it is widely supposed that pairing occurs through high-energy intramolecular phonons. As in semiconductors, the bunch of bands is treated by ascribing the highest spin to electrons. We derive the analytic expression for the critical temperature, which strongly depends on the value of the total spin of the Cooper pair, which may be equal to Y=0,1,.... In all cases the order parameter is a vector with components proportional to spherical harmonics and at the same time the superconducting gap has no zeros. The data may be fitted to doped fullerenes, if the superconductivity arises from d-pairing.

Original languageBritish English
Pages (from-to)787-791
Number of pages5
JournalJournal of Superconductivity
Volume7
Issue number5
DOIs
StatePublished - Oct 1994

Keywords

  • critical temperature
  • Fullerenes
  • orbital momenta
  • order parameter
  • superconducting gap
  • superconducting pairs
  • topological defects

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