Test of universality at first order phase transitions: The Lebwohl–Lasher model.

Autor: Xue, Aojie, Xu, Jiahao, Landau, D. P., Binder, K.
Předmět:
Zdroj: Journal of Chemical Physics; 10/7/2024, Vol. 161 Issue 13, p1-6, 6p
Abstrakt: Finite size scaling for a first order phase transition, where a continuous symmetry is broken, is tested using an approximation of Gaussian probability distributions with a phenomenological "degeneracy" factor. Predictions are compared to the data from Monte Carlo simulations of the Lebwohl–Lasher model on L × L × L simple cubic lattices. The data show that the intersection of the fourth-order cumulant of the order parameter for different lattice sizes can be expressed in terms of the relative degeneracy q = 4π of the ordered and disordered phases. This result further supports the concept of universality at first order transitions developed recently. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index