Spin-charge separation and simultaneous spin and charge Kondo effect
| dc.creator | Zitko, Rok | |
| dc.creator | Bonca, Janez | |
| dc.date | 2006-12-15 | |
| dc.date.accessioned | 2026-07-07T07:35:14Z | |
| dc.date.available | 2026-07-07T07:35:14Z | |
| dc.description | We study the spin-charge separation in a Kondo-like model for an impurity with a spin and a charge (isospin) degree of freedom coupled to a single conduction channel (the ``spin-charge'' Kondo model). We show that the spin and charge Kondo effects can occur simultaneously at any coupling strength. In the continuum (wide-band or weak coupling) limit, the Kondo screening in each sector is independent, while at finite bandwidth and strong coupling the lattice effects lead to a renormalization of the effective Kondo exchange constants; nevertheless, universal spin and charge Kondo effects still occur. We find similar behavior in the two-impurity Anderson model with positive and negative electron-electron interaction and in the two-impurity Anderson-Holstein model with a single phonon mode. We comment on the applicability of such models to describe the conductance of deformable molecules with a local magnetic moment. | |
| dc.description | 13 pages, 11 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0612398 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0612398 | |
| dc.identifier | Phys. Rev. B 74, 224411 (2006) | |
| dc.identifier | doi:10.1103/PhysRevB.74.224411 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/120028 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Spin-charge separation and simultaneous spin and charge Kondo effect | |
| dc.type | text |