The plaquette phase of the square lattice quantum dimer model

Details The plaquette phase of the square lattice quantum dimer model The plaquette phase of the square lattice quantum dimer model

2005-12-22

arxiv.org/abs/cond-mat/0512579v2

Phys. Rev. B 73, 245105 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 18 figures, considerably revised version

Scientific paper

10.1103/PhysRevB.73.245105

The plaquette phase of the square lattice quantum dimer model is studied using a continuous-time reptation quantum Monte Carlo method for lattices of sizes up to 48x48 sites. We determine the location of the phase transition between the columnar and plaquette phases to occur at V_c/J=0.60 +- 0.05 which is significantly larger than inferred from previous exact diagonalization studies on smaller lattices. Offdiagonal correlation functions are obtained. They exhibit long-range order in the plaquette phase but not at the Rokhsar-Kivelson point. We also observe significant finite-size corrections to scaling for the transition between the plaquette phase and the critical resonating valence bond liquid. This study demonstrates the importance of understanding finite-size effects when considering critical properties of the square lattice quantum dimer model.

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