Abstract
We study hard-core bosons with unfrustrated hopping () and nearest neighbor repulsion () (spin model) on the triangular lattice. At half filling, the system undergoes a zero temperature () quantum phase transition from a superfluid phase at small to a supersolid at in units of . This supersolid phase breaks the lattice translation symmetry in a characteristic pattern, and is remarkably stable—indeed, a smooth extrapolation of our results indicates that the supersolid phase persists for arbitrarily large .
- Received 13 May 2005
DOI:https://doi.org/10.1103/PhysRevLett.95.127206
©2005 American Physical Society