Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2011-12-20
Physics
Condensed Matter
Statistical Mechanics
6 pages, 7 figures
Scientific paper
We investigate in this paper the ground state and the nature of the transition from an orientational ordered phase at low temperature to the disordered state at high temperature in a molecular crystal. Our model is a Potts model which takes into account the exchange interaction $J$ between nearest-neighbor molecules and a dipolar interaction between molecular axes in three dimensions. The dipolar interaction is characterized by two parameters: its amplitude $D$ and the cutoff distance $r_c$. If the molecular axis at a lattice site has three orientations, say the $x$, $y$ or $z$ axes, then when D=0, the system is equivalent to the 3-state Potts model: the transition to the disordered phase is known to be of first order. When $D\neq 0$, the ground-state configuration is shown to be composed of two independent interpenetrating layered subsystems which form a sandwich whose periodicity depends on $D$ and $r_c$. We show by extensive Monte Carlo simulation with a histogram method that the phase transition remains of first order at relatively large values of $r_c$.
Diep Hung-The
Hoang Danh-Tai
No associations
LandOfFree
Effect of Dipolar Interaction in Molecular Crystals 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 Effect of Dipolar Interaction in Molecular Crystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of Dipolar Interaction in Molecular Crystals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-189050