Phase diagram of a model for ^{3}He-^{4}He mixtures in three dimensions

A simple model describing 3He-4He mixtures near a wall

2014 We describe the superfluid ordering taking place near a wall in 3He-4He mixtures by means of a semi-infinite version of the Blume-Emery-Griffiths model. A renormalization group analysis of the simplest version of this model yields a phase diagram which compares satisfactorily with available experimental data. J. Physique Lett. 45 (1984) L-591 L-596 15 JUIN 1984 Classification Physics Abstr...

Dynamic structure function in 3He-4He mixtures.

lntedacial Tension Near the Tricritical Point in 3He--4He Mixtures

The same relationship holds for the interfacial tension o-i at the consolute critical point (the critical point for phase separation) of a binary fluid mixture. Up to now no rigorous theory links the interfacial tension to properties of the bulk system. However, a phenomenological approach which should be valid in the vicinity of the critical point has been developed by Fisk and Widom. 2 Accord...

Approach tq complete wetting in 4He-3He binary liquid mixtures

We reanalyse an experimental work, including some unpublished results, on the adsorption of 4He atoms on a substrate in a 4He-3He mixture. We verify with remarkable accuracy the powerlaw dependence of the 4He adsorption thickness as a function of the distance AT to coexistence : e = C1/ (0394T) 1/3, for thicknesses e ranging from 20 to 80 Å (5 to 20 atomic layers). The analysis is made possible...

Microscopic approach to the response of 3He-4He mixtures.

Correlated-basis-function perturbation theory is used to evaluate the zero-temperature response S(q ,v) of He-He mixtures for inelastic neutron scattering, at momentum transfers q ranging from 1.1 to 1.8 Å. We adopt a Jastrow correlated ground state and a basis of correlated particle-hole and phonon states. We insert correlated one-particle–one-hole and oneand two-phonon states to compute the s...