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

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.


Published in:
Physical Review Letters, 99, 12, 127202
Year:
2007
Laboratories:


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 Record created 2019-06-24, last modified 2020-04-20

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