Tricritical Dynamics at the Demixing- λ-Transition in 3He-4He Mixtures

Details Tricritical Dynamics at the Demixing- λ-Transition in 3He-4He Mixtures Tricritical Dynamics at the Demixing- λ-Transition in 3He-4He Mixtures

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jltp..150..689f&link_type=abstract

Journal of Low Temperature Physics, Volume 150, Issue 5-6, pp. 689-709

Physics

1

Scientific paper

We calculate in two loop order the dynamical critical behavior at the tricritical point occuring in 3He-4He mixtures. Model F' introduced by Siggia and Nelson (Phys. Rev. B 15:1427, [1977])—already problematic in one loop order—is shown in two loop order to lead to a divergence of the mass diffusion D in contradiction to experiments. Within the complex symmetric version of this model (model E ⋆') the dynamical critical exponents of the kinetic coefficients can be calculated exactly leading to a mass diffusion going to zero at the tricritical point as D( t X )˜ t {/X 1/2} ( t X is the relative temperature distance at constant concentration) and the thermal diffusion ratio k T ˜ t {/X -1} diverges proportional to the concentration susceptibility in the experimental region. We also discuss effective dynamical critical exponents and compare them with recent simulations of the vector Blume-Emery-Griffths model.

Affiliated with

Also associated with

No associations

Rating

Tricritical Dynamics at the Demixing- λ-Transition in 3He-4He Mixtures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Tricritical Dynamics at the Demixing- λ-Transition in 3He-4He Mixtures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tricritical Dynamics at the Demixing- λ-Transition in 3He-4He Mixtures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-767583