Analysis of Strong-Coupling Parameters for Superfluid 3He
Abstract
Superfluid He 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 -coefficients of the fourth order Ginzburg-Landau free energy terms. The Ginzburg-Landau free energy also has a coefficient to include magnetic field coupling to the order parameter. From NMR susceptibility experiments, we find the deviation of from its weak-coupling value to be negligible at all pressures. New results for the pressure dependence of four different combinations of -coefficients, _{345}, _{12}, _{245}, and _{5} are calculated and comparison is made with theory.
Cite
@article{arxiv.cond-mat/0606786,
title = {Analysis of Strong-Coupling Parameters for Superfluid 3He},
author = {H. Choi and J. P. Davis and J. Pollanen and T. M. Haard and W. P. Halperin},
journal= {arXiv preprint arXiv:cond-mat/0606786},
year = {2009}
}
Comments
6 pages, 2 figures, 1 table. Manuscript prepared for QFS2006