Analysis of strong-coupling parameters for superfluid He-3

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Superfluid He-3 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 beta-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 beta-coefficients, beta(345), beta(12), beta(245), and beta(5) are calculated and comparison is made with theory.
Publisher
SPRINGER/PLENUM PUBLISHERS
Issue Date
2007-09
Language
English
Article Type
Article
Keywords

STRONG MAGNETIC-FIELDS; RESPONSE FUNCTIONS; B-PHASE; NMR; SUSCEPTIBILITY; RESONANCE; MODELS

Citation

JOURNAL OF LOW TEMPERATURE PHYSICS, v.148, no.5-6, pp.507 - 511

ISSN
0022-2291
DOI
10.1007/s10909-007-9420-z
URI
http://hdl.handle.net/10203/87658
Appears in Collection
PH-Journal Papers(저널논문)
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