Phase Diagram of the $t$--$U$--$V_1$--$V_2$ Model at Quarter Filling
| dc.creator | Ejima, Satoshi | |
| dc.creator | Gebhard, Florian | |
| dc.creator | Nishimoto, Satoshi | |
| dc.creator | Ohta, Yukinori | |
| dc.date | 2004-11-05 | |
| dc.date | 2005-01-25 | |
| dc.date.accessioned | 2026-07-07T03:01:54Z | |
| dc.date.available | 2026-07-07T03:01:54Z | |
| dc.description | We examine the ground-state properties of the one-dimensional Hubbard model at quarter filling with Coulomb interactions between nearest-neighbors $V_1$ and next-nearest neighbors $V_2$. Using the density-matrix renormalization group and exact diagonalization methods, we obtain an accurate ground-state phase diagram in the $V_1$-$V_2$ plane with three different phases: $2k_{\rm F}$- and $4k_{\rm F}$-charge-density-wave and a broad metallic phase in-between. The metal is a Tomonaga-Luttinger-liquid whose critical exponent $K_ρ$ is largest around $V_1=2V_2$, where $V_1$ and $V_2$ are frustrated, and smallest, $K_ρ=0.25$, at the boundaries between the metallic phase and each of the two ordered phases. | |
| dc.description | 4 pages, 5 figures, sumitted to PRB | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0411151 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0411151 | |
| dc.identifier | Phys. Rev. B, 72, 033101 (2005) | |
| dc.identifier | doi:10.1103/PhysRevB.72.033101 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/25218 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Phase Diagram of the $t$--$U$--$V_1$--$V_2$ Model at Quarter Filling | |
| dc.type | text |