Journal
PHYSICAL REVIEW B
Volume 79, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.020409
Keywords
frustration; Ising model; superfluidity
Funding
- NSFC [10688401, 10804103]
- National Program for Basic Research of MOST, China
- DOE [DE-FG02-06ER46305]
- NSF [DMR-0605696, DMR-0611562, DMR-0804564]
- Packard Foundation
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We numerically demonstrate that a supersolid phase exists in a frustrated hard-core boson system on a triangular lattice over a wide range of interaction strength. In the infinite repulsion (Ising) limit, we establish a mapping to the same problem with unfrustrated hopping, which connects the supersolid to the known results in that case. The weak superfluidity can be destroyed or strongly enhanced by a next-nearest-neighbor hopping term, which provides valuable information for experimental realization of a supersolid phase on optical lattice. A phase diagram for the frustrated anisotropic Heisenberg model on triangular lattice is also established.
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