Statistical mechanics model for orientational motion of two-dimensional rigid rotator

A comparison of thermodynamics properties of two-dimensional linear rigid rotator is presented in the absence, and presence of an impressed weak electric field at low and high temperatures. It is shown that specific heat and entropy fall off rapidly at low temperatures. At ultra low temperatures, the entire normal entropy is lost and we have complete ordering by the impressed field. In the classical limit it is shown that there is a temperature dependent polarizability