J. Phys. I France
Volume 5, Numéro 6, June 1995
Page(s) 671 - 674
DOI: 10.1051/jp1:1995108
J. Phys. I France 5 (1995) 671-674

Oil-Water Interface in the Widom Model: Is It Smooth, Rough or Crumpled?

Prabal K. Maiti and Debashish Chowdhury

Department of Physics, Indian Institute of Technology, Kanpur 208016, India

(Received 23 November 1994, revised 18 January 1995, accepted 6 February 1995)

The interface in the two-dimensional Ising model with only nearest-neighbour ferromagnetic interactions is known to be rough at all temperatures T>0. The Widom model for ternary microemulsions is, effectively, a spin-1/2 Ising model with, not only nearest-neighbour ferromagnetic interactions, but also specific farther-neighbour antiferromagnetic interactions. We investigate the effects of these farther-neighbour interactions in the Widom model on the roughening properties of the interface by carrying out Monte Carlo simulations.

© Les Editions de Physique 1995

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