Exactly Solvable Interacting Spin-Ice Vertex Model

Details Exactly Solvable Interacting Spin-Ice Vertex Model Exactly Solvable Interacting Spin-Ice Vertex Model

2006-08-23

arxiv.org/abs/cond-mat/0608504v1

Phys. Rev. E, vol. 74, 011115 (2006)

Physics

Condensed Matter

Statistical Mechanics

14 pages, 11 figures

Scientific paper

10.1103/PhysRevE.74.011115

A special family of solvable five-vertex model is introduced on a square lattice. In addition to the usual nearest neighbor interactions, the vertices defining the model also interact alongone of the diagonals of the lattice. Such family of models includes in a special limit the standard six-vertex model. The exact solution of these models gives the first application of the matrix product ansatz introduced recently and applied successfully in the solution of quantum chains. The phase diagram and the free energy of the models are calculated in the thermodynamic limit. The models exhibit massless phases and our analyticaland numerical analysis indicate that such phases are governed by a conformal field theory with central charge $c=1$ and continuosly varying critical exponents.

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