Dynamical two electron states in a Hubbard-Davydov model
| dc.creator | Cruzeiro-Hansson, L. | |
| dc.creator | Eilbeck, J. C. | |
| dc.creator | Marin, J. L. | |
| dc.creator | Russell, F. M. | |
| dc.date | 2004-04-30 | |
| dc.date.accessioned | 2026-07-07T02:57:55Z | |
| dc.date.available | 2026-07-07T02:57:55Z | |
| dc.description | We study a model in which a Hubbard Hamiltonian is coupled to the dispersive phonons in a classical nonlinear lattice. Our calculations are restricted to the case where we have only two quasi-particles of opposite spins, and we investigate the dynamics when the second quasi-particle is added to a state corresponding to a minimal energy single quasi-particle state. Depending on the parameter values, we find a number of interesting regimes. In many of these, discrete breathers (DBs) play a prominent role with a localized lattice mode coupled to the quasiparticles. Simulations with a purely harmonic lattice show much weaker localization effects. Our results support the possibility that DBs are important in HTSC. | |
| dc.description | 14 pages, 12 figs | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0404743 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0404743 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/23868 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Dynamical two electron states in a Hubbard-Davydov model | |
| dc.type | text |