| Issue |
Europhys. Lett.
Volume 55, Number 3, August 2001
|
|
|---|---|---|
| Page(s) | 362 - 368 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00424-4 | |
| Published online | 01 December 2003 | |
Field-induced anti-nematic ordering in assemblies of anisotropically polarizable particles
1
INFM, Dipartimento di Fisica, Politecnico di Milano -
20133 Milano, Italy
2
INFM, Dipartimento di Elettronica, Università di
Pavia - 27100 Pavia, Italy
3
INFM, Dipartimento di Informatica e Sistemistica
Università di Pavia - 27100 Pavia, Italy
4
INFM, Dipartimento di Medicina Sperimentale
Università di Milano Bicocca - 20052 Monza, Italy
5
INFM, SISSA - via Beirut 4, 34014 Trieste, Italy
Received:
8
February
2001
Accepted:
28
May
2001
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.
PACS: 64.60.Fr – Equilibrium properties near critical points, critical exponents / 82.70.Dd – Colloids
© EDP Sciences, 2001
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