Two-Dimensional Ising Model with Competing Interactions as a Model for Interacting pi-Rings
ACTA PHYSICA POLONICA A(2009)
Abstract
We investigate the Ising model on a square lattice with antiferromagnetic exchange between nearest and next-nearest neighbors and show that at low temperatures stripe-like and droplet-like superstructures appear. We show that the competing interactions introduce a strong frustration that could plausibly describe the systems with dipole-dipole type interactions and pay particular attention to arrays of interacting Josephson pi-rings.
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Key words
competing interactions,two-dimensional
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