Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.017203
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Funding
- NSF-DMR [0645691]
- ARO [W911NF-07-1-0576]
- Direct For Mathematical & Physical Scien [0645691] Funding Source: National Science Foundation
- Division Of Materials Research [0645691] Funding Source: National Science Foundation
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We study a model of hard-core bosons with frustrated nearest-neighbor hopping (t) and repulsion (V) on the triangular lattice. We argue for a supersolid ground state in the large repulsion (V >|t|) limit where a dimer representation applies, by constructing a unitary mapping to the well-understood unfrustrated hopping case. This generalized Marshall sign rule allows us to establish the precise nature of the supersolid order by utilizing a recently proposed dimer variational wave function, whose correlations can be efficiently calculated using the Grassmann approach. By continuity, a supersolid is predicted over the wide parameter range, V >-2t > 0. This also establishes a simple phase diagram for the triangular lattice spin 1/2 XXZ antiferromagnet.
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