cond-mat abstract 9503061
cond-mat/9503061
Paper: cond-mat/9503061
From: David Vanderbilt <dhv@physics.rutgers.edu>
Date: Sat, 11 Mar 1995 18:05:34 -0500
Title: Stability of periodic domain structures in a two-dimensional dipolar
model
Authors: Kwok-On Ng and David Vanderbilt, Department of Physics and Astronomy,
Rutgers University
Comments: Revtex (preprint style, 19 pages) + 4 postscript figures. A version
in two-column article style with embedded figures is available at
this http URL .
We investigate the energetic ground states of a model two-phase system with
1/r^3 dipolar interactions in two dimensions. The model exhibits spontaneous
formation of two kinds of periodic domain structure. A striped domain structure
is stable near half filling, but as the area fraction is changed, a transition
to a hexagonal lattice of almost-circular droplets occurs. The stability of the
equilibrium striped domain structure against distortions of the boundary is
demonstrated, and the importance of hexagonal distortions of the droplets is
quantified. The relevance of the theory for physical surface systems with
elastic, electrostatic, or magnetostatic 1/r^3 interactions is discussed.
(N.B.: delivery types and potential problems)
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