Exact and numerical results for the dimerized spin-orbital model
| dc.creator | Martins, M. J. | |
| dc.creator | Nienhuis, B. | |
| dc.date | 2000-04-14 | |
| dc.date.accessioned | 2026-07-07T02:37:21Z | |
| dc.date.available | 2026-07-07T02:37:21Z | |
| dc.description | We establish exact results for the one-dimensional spin-orbital model for special values of the four-spin interaction $V$ and dimerization parameter $δ$. The first exact result is at $δ=1/2$ and $V=-2$. Because we find a very small but finite gap in this dimerized chain, this can serve as a very strong test case for numerical and approximate analytical techniques. The second result is for the homogeneous chain with $V=-4$ and gives evidence that the system has a spontaneously dimerized ground state. Numerical results indicate that the interplay between dimerization and interaction could result in gapless phases in the regime $0\leq V<-2$. | |
| dc.description | 11 pages, latex, one figure | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0004238 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0004238 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/16260 | |
| dc.subject | Statistical Mechanics | |
| dc.title | Exact and numerical results for the dimerized spin-orbital model | |
| dc.type | text |