Fractional-filling Mott domains in two dimensional optical superlattices
| dc.creator | Buonsante, Pierfrancesco | |
| dc.creator | Penna, Vittorio | |
| dc.creator | Vezzani, Alessandro | |
| dc.date | 2005-05-26 | |
| dc.date.accessioned | 2026-07-07T06:25:19Z | |
| dc.date.available | 2026-07-07T06:25:19Z | |
| dc.description | Ultracold bosons in optical superlattices are expected to exhibit fractional-filling insulating phases for sufficiently large repulsive interactions. On strictly 1D systems, the exact mapping between hard-core bosons and free spinless fermions shows that any periodic modulation in the lattice parameters causes the presence of fractional-filling insulator domains. Here, we focus on two recently proposed realistic 2D structures where such mapping does not hold, i.e. the two-leg ladder and the trimerized kagome' lattice. Based on a cell strong-coupling perturbation technique, we provide quantitatively satisfactory phase diagrams for these structures, and give estimates for the occurrence of the fractional-filling insulator domains in terms of the inter-cell/intra-cell hopping amplitude ratio. | |
| dc.description | 4 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0505655 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0505655 | |
| dc.identifier | Phys. Rev. A 72, 031602 (2005) | |
| dc.identifier | doi:10.1103/PhysRevA.72.031602 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/96801 | |
| dc.subject | Statistical Mechanics | |
| dc.subject | Other Condensed Matter | |
| dc.title | Fractional-filling Mott domains in two dimensional optical superlattices | |
| dc.type | text |