Analysis of Strong-Coupling Parameters for Superfluid 3He
- 32 Downloads
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.
PACS67.57.-z 67.57.Bc 67.57.Lm
Unable to display preview. Download preview PDF.
- 9.T.M. Haard, Ph.D. thesis, Northwestern University, 2001, unpublished Google Scholar
- 12.G.F. Moores, Ph.D. thesis, Northwestern University, 1993, unpublished Google Scholar
- 13.D. Rainer, J.A. Sauls, private communication Google Scholar
- 19.H.N. Scholz, Ph.D. thesis, Ohio State University, 1981, unpublished Google Scholar