Ordering in Ising square lattices with nearest and next nearest neighbor repulsion

Christian Uebing

Physica A: Statistical Mechanics and its Applications, 1994, vol. 210, issue 1, 205-216

Abstract: The phase diagram of an Ising square lattice with nearest and next nearest neighbor repulsion of equal strength is analyzed by means of Monte Carlo simulation. At low temperatures a multidomain and a (2 × 1) ordered lattice gas phase are found for θ ≈ 14, 34 and θ ≈ 12 in contradiction to previous Monte Carlo studies. The multidomain phase consists of patches of (2 × 2) and c(4 × 2) lattice gas phases. From a careful inspection of diffraction pattern it is possible to distinguish between multidomain and (2 × 1) lattice gas phases. The phase diagram for the present lattice gas model indicates regions of increased disorder between multidomain and (2 × 1) phases.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:210:y:1994:i:1:p:205-216

DOI: 10.1016/0378-4371(94)00083-2

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