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

References in corpus (6)

• Supersolid hardcore bosons on the triangular lattice
• Supersolids versus phase separation in two-dimensional lattice bosons
• Field Induced Supersolid Phase in Spin-One Heisenberg Models
• Quantum and thermal transitions out of the supersolid phase of a 2D quantum antiferromagnet
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Cited by in corpus (3)

• Phase diagram of the Ising square lattice with competing interactions
• Vacancy supersolid of hard-core bosons on the square lattice
• Monte Carlo studies of the Ising square lattice with competing interactions