Supersolid phases in the extended boson hubbard model

Abstract

We present a comprehensive numerical study on the ground state phase diagram of the two-dimensional hardcore boson extended Hubbard model with nearest ($V_1$) and next nearest neighbor ($V_2$) repulsions. In addition to the quantum solid and superfluid phases, we report the existence of striped supersolid and three-quarter (quarter) filled supersolid at commensurate density $\rho =0.75$ (0.25) due to the interplay of $V_1$ and $V_2$ interactions. The nature of three-quarter filled supersolid and the associated quantum solid will be discussed. Quantum phase transition between the two supersolids of different symmetries is observed and is clearly of first order.

4 pages, 6 figures

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• Staggered superfluid phases of dipolar bosons in two-dimensional square lattices
• Competing quantum phases of hard-core boson with tilted dipole-dipole interaction
• Monte Carlo studies of the Ising square lattice with competing interactions
• Segregated quantum phases of dipolar bosonic mixtures in two-dimensional optical lattices
• Superfluidity and solid orders in two-component Bose gas with dipolar interactions in an optical lattice
• Inhomogeneous hard-core bosonic mixture with checkerboard supersolid phase: Quantum and thermal phase diagram
• Phase diagram of dipolar hard-core bosons on honeycomb lattice
• Staggered quantum phases of dipolar bosons at finite temperatures
• Frustration-Induced Supersolid Phases of Extended Bose-Hubbard Model in the Hard-Core Limit
• Frustration induced incommensurate solids in the extended Bose-Hubbard model
• Miscibility-Immiscibility transition of strongly interacting bosonic mixtures in optical lattices
• Coexistence of long-range orders in a Bose-Holstein model