Journal of Low Temperature Physics

, Volume 148, Issue 5–6, pp 507–511 | Cite as

Analysis of Strong-Coupling Parameters for Superfluid 3He

  • H. Choi
  • J. P. Davis
  • J. Pollanen
  • T. M. Haard
  • W. P. Halperin
Article

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 gz to include magnetic field coupling to the order parameter. From NMR susceptibility experiments, we find the deviation of gz from its weak-coupling value to be negligible at all pressures. New results for the pressure dependence of four different combinations of β-coefficients, β345, β12, β245, and β5 are calculated and comparison is made with theory.

PACS

67.57.-z 67.57.Bc 67.57.Lm 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • H. Choi
    • 1
  • J. P. Davis
    • 1
  • J. Pollanen
    • 1
  • T. M. Haard
    • 1
  • W. P. Halperin
    • 1
  1. 1.Department of Physics and AstronomyNorthwestern UniversityEvanstonUSA

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