Persistent supersolid phase of hard-core bosons on the triangular lattice

2005/05/21 by Dariush Heidarian, Kedar Damle · 2 citations
Physics and Astronomy · #cond-mat.str-el #cond-mat.stat-mech

paper · pdf · doi:10.1103/physrevlett.95.127206

published as Phys. Rev. Lett. 95, 127206 (2005) · 4 pages, 5 figures, two column format

arxiv created 2005/05/21 · arxiv updated 2016/08/31

Abstract

We study hard-core bosons with unfrustrated hopping (t) and nearest neighbour repulsion (U) on the triangular lattice. At half-filling, the system undergoes a zero temperature (T) quantum phase transition from a superfluid phase at small U to a supersolid at U_c ≈ 4.45 in units of 2t. This supersolid phase breaks the lattice translation symmetry in a characteristic √(3) × √(3) pattern, and is remarkably stable--indeed, a smooth extrapolation of our results indicates that the supersolid phase persists for arbitrarily large U/t.

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