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Analysis of Strong-Coupling Parameters for Superfluid 3He | H. Choi
; J.P. Davis
; J. Pollanen
; T.M. Haard
; W.P. Halperin
; | Date: |
30 Jun 2006 | Subject: | Superconductivity; Other | Abstract: | Superfluid $^{3}$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 $eta$-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 $eta$-coefficients, $eta$_{345}, $eta$_{12}, $eta$_{245}, and $eta$_{5} are calculated and comparison is made with theory. | Source: | arXiv, cond-mat/0606786 | Services: | Forum | Review | PDF | Favorites |
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