Supersolid phase of hard-core bosons on a triangular lattice |
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Authors: | Boninsegni Massimo Prokof'ev Nikolay |
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Institution: | Department of Physics, University of Alberta, Edmonton, Alberta T6G 2J1, Canada. |
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Abstract: | We study properties of the supersolid phase observed for hard-core bosons on the triangular lattice near half-integer filling factor, and the phase diagram of the system at finite temperature. We find that the solid order is always of the (2m, -m, -m) with m changing discontinuously from positive to negative values at half filling, in contrast with phases observed for Ising spins in a transverse magnetic field. At finite temperature we find two intersecting second-order transition lines: one in the 3-state Potts universality class and the other of the Kosterlitz-Thouless type. |
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