First order phase transitions in classical lattice gas spin models

Details First order phase transitions in classical lattice gas spin models First order phase transitions in classical lattice gas spin models

2007-05-15

arxiv.org/abs/0705.2116v1

Phys. Rev. B 75, 184413 (2007) (9 pages)

Physics

Condensed Matter

Statistical Mechanics

9 pages, 12 figures

Scientific paper

10.1103/PhysRevB.75.184413

The present paper considers some classical ferromagnetic lattice--gas models, consisting of particles that carry $n$--component spins ($n=2,3$) and associated with a $D$--dimensional lattice ($D=2,3$); each site can host one particle at most, thus implicitly allowing for hard--core repulsion; the pair interaction, restricted to nearest neighbors, is ferromagnetic, and site occupation is also controlled by the chemical potential $\mu$. The models had previously been investigated by Mean Field and Two--Site Cluster treatments (when D=3), as well as Grand--Canonical Monte Carlo simulation in the case $\mu=0$, for both D=2 and D=3; the obtained results showed the same kind of critical behaviour as the one known for their saturated lattice counterparts, corresponding to one particle per site. Here we addressed by Grand--Canonical Monte Carlo simulation the case where the chemical potential is negative and sufficiently large in magnitude; the value $\mu=-D/2$ was chosen for each of the four previously investigated counterparts, together with $\mu=-3D/4$ in an additional instance. We mostly found evidence of first order transitions, both for D=2 and D=3, and quantitatively characterized their behaviour. Comparisons are also made with recent experimental results.

Affiliated with

Also associated with

No associations

Rating

First order phase transitions in classical lattice gas spin models 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 First order phase transitions in classical lattice gas spin models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First order phase transitions in classical lattice gas spin models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-622899