Phase separation and flux quantization in the doped quantum dimer model on the square and triangular lattices

Details Phase separation and flux quantization in the doped quantum dimer model on the square and triangular lattices Phase separation and flux quantization in the doped quantum dimer model on the square and triangular lattices

2007-04-05

arxiv.org/abs/0704.0715v2

Phys. Rev. Lett. 99, 127202 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.99.127202

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 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.

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