Some properties of a spin-1 Fermi superfluid: Application to spin-polarized 6Li

A. G.K. Modawi, A. J. Leggett

Research output: Contribution to journalArticle

Abstract

We discuss some of the unusual characteristics of a Fermi superfluid formed by Cooper pairing in a system, such as spin-polarized 6Li, which possesses triple nuclear spin degeneracy. In particular we show (a) that the "naive" BCS expression for the transition temperature is (unlike in the usual spin-1/2 case) exact in the low-density limit, and (b) that there must always be a gapless branch of the excitation spectrum even for s-wave pairing, so that the normal density is nonzero at T = 0.

Original languageEnglish (US)
Pages (from-to)625-639
Number of pages15
JournalJournal of Low Temperature Physics
Volume109
Issue number3-4
DOIs
StatePublished - 1997

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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