Three-body interactions on a triangular lattice

Journal Article · Sun May 01 04:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.83.184513· OSTI ID:21544764

Xuefeng, Zhang ^[1]; Yuchuan, Wen ^[2]; Yue, Yu ^[1]

---

1. Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190 (China)
2. Center of Theoretical Physics, Department of Physics, Capital Normal University, Beijing 100048 (China)

We analyze the hard-core Bose-Hubbard model with both three-body and nearest-neighbor repulsions on a triangular lattice. The phase diagram is achieved by means of the semiclassical approximation and a quantum Monte Carlo simulation. For a system with only three-body interactions, both the supersolid phase and the one-third solid disappear while the two-thirds solid is stable. As the thermal behavior of the bosons with nearest-neighbor repulsion, the solid and the superfluid undergo the three-state Potts- and Kosterlitz-Thouless-type phase transitions, respectively. In a system with both frustrated nearest-neighbor two-body and three-body interactions, the supersolid and one-third solid are revived. By tuning the strength of the three-body interactions, the phase diagram is distorted because the one-third solid and the supersolid are suppressed.

• OSTI ID: 21544764
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 18 Vol. 83; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APPROXIMATIONS
BOSONS
CALCULATION METHODS
COMPUTERIZED SIMULATION
CONFIGURATION
CRYSTAL LATTICES
CRYSTAL MODELS
CRYSTAL STRUCTURE
DIAGRAMS
HUBBARD MODEL
INFORMATION
INTERACTIONS
MANY-BODY PROBLEM
MATHEMATICAL MODELS
MONTE CARLO METHOD
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
SEMICLASSICAL APPROXIMATION
SIMULATION
SOLIDS
SUPERFLUIDITY
THREE-BODY PROBLEM
TRIANGULAR CONFIGURATION