Analysis of strong-coupling parameters for superfluid 3He

H. Choi*, J. P. Davis, J. Pollanen, T. M. Haard, W. P. Halperin

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Superfluid 3He experiments show strong deviation from the weak-coupling limit of the Ginzburg-Landau theory, and this discrepancy grows with increasing pressure. Strong-coupling contributions to the quasiparticle interactions are known to account for this effect and they are manifest in the five β -coefficients of the fourth order Ginzburg-Landau free energy terms. The Ginzburg-Landau free energy also has a coefficient g z to include magnetic field coupling to the order parameter. From NMR susceptibility experiments, we find the deviation of g z from its weak-coupling value to be negligible at all pressures. New results for the pressure dependence of four different combinations of β-coefficients, β 345, β 12, β 245, and β 5 are calculated and comparison is made with theory.

Original languageEnglish (US)
Pages (from-to)507-511
Number of pages5
JournalJournal of Low Temperature Physics
Volume148
Issue number5-6
DOIs
StatePublished - Sep 1 2007

Keywords

  • 67.57.-z
  • 67.57.Bc
  • 67.57.Lm

ASJC Scopus subject areas

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

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