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DOE OSTI · 21544764

Three-body interactions on a triangular lattice

Xuefeng, Zhang·Yuchuan, Wen·Yue, Yu
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Abstract

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.

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75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYAPPROXIMATIONSBOSONSCALCULATION METHODSCOMPUTERIZED SIMULATIONCONFIGURATIONCRYSTAL LATTICESCRYSTAL MODELSCRYSTAL STRUCTUREDIAGRAMSHUBBARD MODELINFORMATIONINTERACTIONSMANY-BODY PROBLEMMATHEMATICAL MODELSMONTE CARLO METHODPHASE DIAGRAMSPHASE TRANSFORMATIONSSEMICLASSICAL APPROXIMATIONSIMULATIONSOLIDSSUPERFLUIDITYTHREE-BODY PROBLEMTRIANGULAR CONFIGURATION

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Xuefeng, Zhang, Yuchuan, Wen, Yue, Yu. 2011-05-01. Three-body interactions on a triangular lattice. https://doi.org/10.1103/physrevb.83.184513

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