By employing Monte Carlo simulations, both the helicity modulus and the heat capacity of a coupled classical XY model in two dimensions have been calculated. The model is based on the Hamiltonian proposed by Bruinsma and Aeppli [Phys. Rev. Lett. 48, 1625 (1982)]. For the first time, the model enables us to study the temperature dependence of the helicity modulus and obtain the associated critical exponent near a three-state Potts transition.
|Original language||English (US)|
|Number of pages||5|
|Journal||Physica A: Statistical Mechanics and its Applications|
|State||Published - Nov 15 1995|
Bibliographical noteFunding Information:
One of us (C.C.H.) would like to thank Prof. C. Dasgupta for valuable discussions. This work was partially supported by the National Science Council, Taiwan, under Contract No. NSC 83-0208-M-110-043, the Supercomputer Institute, University of Minnesota and National Science Foundation, Solid State Chemistry, Grant No. DMR 93-00781.