We have investigated the effects of dipolar interactions in a lattice system of anisotropically polarizable particles in the presence of an external field both by Monte Carlo computer simulations and through a mean-field analysis. In a specific range of low temperature, large external field and large particle density, a novel staggered nematic structure is found, in which two intercalated sublattices have different nematic order parameters. First- and second-order phase transition lines, connected at a tricritical point, enclose the anti-nematic phase in the temperature-density plane
Bellini, T., Buscaglia, M., Leporati, F., Mantegazza, F., Maritan, A. (2001). Field-induced anti-nematic ordering in assemblies of anisotropically polarizable particles. EUROPHYSICS LETTERS, 55(3), 362-368 [10.1209/epl/i2001-00424-4].
Field-induced anti-nematic ordering in assemblies of anisotropically polarizable particles
Mantegazza, F;
2001
Abstract
We have investigated the effects of dipolar interactions in a lattice system of anisotropically polarizable particles in the presence of an external field both by Monte Carlo computer simulations and through a mean-field analysis. In a specific range of low temperature, large external field and large particle density, a novel staggered nematic structure is found, in which two intercalated sublattices have different nematic order parameters. First- and second-order phase transition lines, connected at a tricritical point, enclose the anti-nematic phase in the temperature-density plane
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