We present a Monte Carlo Metropolis computer simulation study of the equilibrium configurations of a spin lattice model of anisotropically polarizable particles. In the presence of an external field the spins polarize and couple via dipolar interactions. To simulate the system we used both the complete Hamiltonian, requiring heavy calculations of the local field, and a simplified version, obtained by a first order expansion of the local field. We find that in both cases, the dipolar interaction induces a new and unexpected orientational order characterized by a depressed value of the orientational order parameter [P-2] and by a corresponding enhanced value of [P-4].

Monte Carlo Metropolis simulation of interacting anisotropic polarizable spins on a lattice / G. Danese, I. De Lotto, A. De Marchi, F. Leporati, T. Bellini, M. Buscaglia, F. Mantegazza. - In: COMPUTER PHYSICS COMMUNICATIONS. - ISSN 0010-4655. - 134:1(2001), pp. 47-57. [10.1016/S0010-4655(00)00190-9]

Monte Carlo Metropolis simulation of interacting anisotropic polarizable spins on a lattice

A. De Marchi;T. Bellini;M. Buscaglia
Penultimo
;
2001

Abstract

We present a Monte Carlo Metropolis computer simulation study of the equilibrium configurations of a spin lattice model of anisotropically polarizable particles. In the presence of an external field the spins polarize and couple via dipolar interactions. To simulate the system we used both the complete Hamiltonian, requiring heavy calculations of the local field, and a simplified version, obtained by a first order expansion of the local field. We find that in both cases, the dipolar interaction induces a new and unexpected orientational order characterized by a depressed value of the orientational order parameter [P-2] and by a corresponding enhanced value of [P-4].
computer modeling and simulation of liquid structure; nematic liquid crystals; polarizability; kerr effect; Monte Carlo Metropolis algorithm; acceleration; lattice calculations
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/945805
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