Hardcore bosons on checkerboard lattices near half filling: geometric frustration, vanishing charge order and fractional phase
| dc.creator | Zhou, Yi | |
| dc.date | 2008-06-25 | |
| dc.date.accessioned | 2026-07-07T09:46:35Z | |
| dc.date.available | 2026-07-07T09:46:35Z | |
| dc.description | We study a spinless hardcore boson model on checkerboard lattices by Green function Monte Carlo method. At half filling, the ground state energy is obtained up to $28\times 28$ lattice and extrapolated to infinite size, the staggered pseudospin magnetization is found to vanish in the thermodynamic limit. Thus the $(π,π)$ charge order is absent in this system. Away from half filling, two defects induced by each hole (particle) may carry fractional charge ($\pm e/2$). For one hole case, we study how the defect-defect correlation changes with $t/J$, which is the ratio between the hopping integral and cyclic exchange, equals to $V/2t$ when $V\gg t$. Moreover, we argue that these fractional defects may propagate independently when the concentration of holes (or defects) is large enough. | |
| dc.identifier | https://arxiv.org/abs/0806.4013 | |
| dc.identifier | http://arxiv.org/abs/0806.4013 | |
| dc.identifier | Phys. Rev. B 72, 205116 (2005) | |
| dc.identifier | doi:10.1103/PhysRevB.72.205116 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/163581 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Hardcore bosons on checkerboard lattices near half filling: geometric frustration, vanishing charge order and fractional phase | |
| dc.type | text |