Microphase Separation and modulated phases in a Coulomb frustrated Ising ferromagnet
Statistical Mechanics
2009-10-31 v1
Abstract
We study a 3-dimensional Ising model in which the tendency to order due to short-range ferromagnetic interactions is frustrated by competing long-range (Coulombic) interactions. Complete ferromagnetic ordering is impossible for any nonzero value of the frustration parameter, but the system displays a variety of phases characterized by periodically modulated structures. We have performed extensive Monte-Carlo simulations which provide strong evidence that the microphase separation transition between paramagnetic and modulated phases is a fluctuation-induced first-order transition. Additional transitions to various commensurate phases may also occur when further lowering the temperature.
Keywords
Cite
@article{arxiv.cond-mat/9809250,
title = {Microphase Separation and modulated phases in a Coulomb frustrated Ising ferromagnet},
author = {P. Viot and G. Tarjus},
journal= {arXiv preprint arXiv:cond-mat/9809250},
year = {2009}
}
Comments
6 pages, 4 figures, accepted in Europhys. Letters