arXiv:0704.0715 · Physical Review Letters

Phase Separation and Flux Quantization in the Doped Quantum Dimer Model on Square and Triangular Lattices

Arnaud Ralko, Frédéric Mila, Didier Poilblanc

Published Sep 17, 2007• 13 citations

Abstract

The doped two-dimensional quantum dimer model is investigated by numerical techniques on the square and triangular lattices, with significantly different results. On the square lattice, at small enough doping, there is always a phase separation between an insulating valence-bond solid and a uniform superfluid phase, whereas on the triangular lattice, doping leads directly to a uniform superfluid in a large portion of the resonating-valence-bond (RVB) phase. Under an applied Aharonov-Bohm flux, the superfluid exhibits quantization in terms of half-flux quanta, consistent with Q=2e elementary charge quanta in transport properties.

DOI: 10.1103/physrevlett.99.127202

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