Anderson impurity in a semiconductor
| dc.creator | Galpin, Martin R. | |
| dc.creator | Logan, David E. | |
| dc.date | 2009-02-25 | |
| dc.date.accessioned | 2026-07-07T12:46:42Z | |
| dc.date.available | 2026-07-07T12:46:42Z | |
| dc.description | We consider an Anderson impurity model in which the locally correlated orbital is coupled to a host with a gapped density of states. Single-particle dynamics are studied, within a perturbative framework that includes both explicit second-order perturbation theory and self-consistent perturbation theory to all orders in the interaction. Away from particle-hole symmetry the system is shown to be a generalized Fermi liquid (GFL) in the sense of being perturbatively connectable to the non-interacting limit; and the exact Friedel sum rule for the GFL phase is obtained. We show by contrast that the particle-hole symmetric point of the model is not perturbatively connected to the non-interacting limit, and as such is a non-Fermi liquid for all non-zero gaps. Our conclusions are in agreement with NRG studies of the problem. | |
| dc.description | 7 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0902.4334 | |
| dc.identifier | http://arxiv.org/abs/0902.4334 | |
| dc.identifier | Phys. Rev. B 77, 195108 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.77.195108 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/221473 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Anderson impurity in a semiconductor | |
| dc.type | text |