Supersolidity from defect-condensation in the extended boson Hubbard model

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dc.creatorChen, Yu-Chun
dc.creatorMelko, Roger G.
dc.creatorWessel, Stefan
dc.creatorKao, Ying-Jer
dc.date2007-08-14
dc.date2007-10-26
dc.date.accessioned2026-07-07T08:57:23Z
dc.date.available2026-07-07T08:57:23Z
dc.descriptionWe study the ground state phase diagram of the hard-core extended boson Hubbard model on the square lattice with both nearest- (nn) and next-nearest-neighbor (nnn) hopping and repulsion, using Gutzwiller mean field theory and quantum Monte Carlo simulations. We observe the formation of supersolid states with checkerboard, striped, and quarter-filled crystal structures, when the system is doped away from commensurate fillings. In the striped supersolid phase, a strong anisotropy in the superfluid density is obtained from the simulations; however, the transverse component remains finite, indicating a true two-dimensional superflow. We find that upon doping, the striped supersolid transitions directly into the supersolid with quarter-filled crystal structure, via a first-order stripe melting transition.
dc.descriptionRevtex 4, 6 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/0708.1807
dc.identifierhttp://arxiv.org/abs/0708.1807
dc.identifierPhys. Rev. B 77, 014524 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.014524
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/146947
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleSupersolidity from defect-condensation in the extended boson Hubbard model
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