Folding transitions of the square--diagonal two--dimensional lattice
release_w3oznkox3bgjbcef5ycmtckigu
by
E.N.M. Cirillo,
G. Gonnella,
A. Pelizzola
2000
Abstract
The phase diagram of a vertex model introduced by P. Di Francesco (Nucl.
Phys. B 525, 507 1998) representing the configurations of a square lattice
which can fold with different bending energies along the main axes and the
diagonals has been studied by Cluster Variation Method. A very rich structure
with partially and completely folded phases, different disordered phases and a
flat phase is found. The crumpling transition between a disordered and the flat
phase is first-order. The CVM results are confimed by the analysis of the
ground states and of the two limits where the model reduces to an Ising model.
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cond-mat/0002248v1
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