Bound states in weakly disordered spin ladders
| dc.creator | Arlego, M. | |
| dc.creator | Brenig, W. | |
| dc.creator | Cabra, D. C. | |
| dc.creator | Heidrich-Meisner, F. | |
| dc.creator | Honecker, A. | |
| dc.creator | Rossini, G. | |
| dc.date | 2004-11-30 | |
| dc.date.accessioned | 2026-07-07T03:02:26Z | |
| dc.date.available | 2026-07-07T03:02:26Z | |
| dc.description | We study the appearance of bound states in the spin gap of spin-1/2 ladders induced by weak bond disorder. Starting from the strong-coupling limit, i.e., the limit of weakly coupled dimers, we perform a projection on the single-triplet subspace and derive the position of bound states for the single impurity problem of one modified coupling as well as for small impurity clusters. The case of a finite concentration of impurities is treated with the coherent-potential approximation in the strong-coupling limit and compared with numerical results. Furthermore, we analyze the details in the structure of the density of states and relate their origin to the influence of impurity clusters. | |
| dc.description | 2 pages, 1 figure. Proceedings of SCES'04, to appear in Physica B | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0411751 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0411751 | |
| dc.identifier | Physica B 359-361, 1424 (2005) | |
| dc.identifier | doi:10.1016/j.physb.2005.01.435 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/25390 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Disordered Systems and Neural Networks | |
| dc.title | Bound states in weakly disordered spin ladders | |
| dc.type | text |