On the Coexistence of Diagonal and off-Diagonal Long-Range Order, a Monte Carlo Study

Details On the Coexistence of Diagonal and off-Diagonal Long-Range Order, a Monte Carlo Study On the Coexistence of Diagonal and off-Diagonal Long-Range Order, a Monte Carlo Study

1993-12-08

arxiv.org/abs/cond-mat/9312034v1

Physics

Condensed Matter

7 pages and 8 figures appended in postscript, KA-TFP-93-05

Scientific paper

10.1103/PhysRevLett.72.3598

The zero temperature properties of interacting 2 dimensional lattice bosons are investigated. We present Monte Carlo data for soft-core bosons that demonstrate the existence of a phase in which crystalline long-range order and off-diagonal long-range order (superfluidity) coexist. We comment on the difference between hard and soft-core bosons and compare our data to mean-field results that predict a larger coexistence region. Furthermore, we determine the critical exponents for the various phase transitions.

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