Supersolid phase of hardcore bosons on triangular lattice

Abstract

We establish the nature of the supersolid phase observed for hardcore bosons on the triangular lattice near half-integer filling factor, and study 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, contrary to predictions of other phases, based on an analogy with the properties of Ising spins in 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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• Supersolid hardcore bosons on the triangular lattice
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• Persistent supersolid phase of hard-core bosons on the triangular lattice
• Interplay of quantum and thermal fluctuations in a frustrated magnet
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