2D and 3D quantum rotors in a crystal field: critical points, metastability, and reentrance

Details 2D and 3D quantum rotors in a crystal field: critical points, metastability, and reentrance 2D and 3D quantum rotors in a crystal field: critical points, metastability, and reentrance

2009-07-07

arxiv.org/abs/0907.1299v1

In Proceedings of the NATO Advanced Research Workshop "Metastable Systems Under Pressure", Eds. S. Rzoska, A. Drozd-Rzoska and

Physics

Condensed Matter

Statistical Mechanics

submitted to the Proceedings of the NATO Advanced Research Workshop "Matastable Systems under Pressure: Platforms for New Tech

Scientific paper

An overview of results of models of coupled quantum rotors is presented. We focus on rotors with dipolar and quadrupolar potentials in two and three dimensions, potentials which correspond to approximate descriptions of real molecules adsorbed on surfaces and in the solid phase. Particular emphasis is placed on the anomalous reentrant phase transition which occurs in both two and three-dimensional systems. The anomalous behaviour of the entropy, which accompanies the reentrant phase transition, is also analyzed and is shown to be present regardless if a phase transition is present or not. Finally, the effects of the crystal field on the phase diagrams are also investigated. In two-dimensions the crystal field causes the disappearance of the phase transition, and ordering takes place via a continuous increase in the value of the order parameter. This is also true in three dimensions for the dipolar potential. For the quadrupolar potential in three dimensions turning on the crystal field leads to the appearance of critical points where the phase transition ceases, and ordering occurs via a continuous increase in the order parameter. As the crystal field is increased the range of the coupling constant over which metastable states are found decreases.

Affiliated with

Also associated with

No associations

Rating

2D and 3D quantum rotors in a crystal field: critical points, metastability, and reentrance 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 2D and 3D quantum rotors in a crystal field: critical points, metastability, and reentrance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 2D and 3D quantum rotors in a crystal field: critical points, metastability, and reentrance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-319469