Kondo Impurity in a Mesoscopic Ring: Charge Persistent Current
| dc.creator | Eckle, H. -P. | |
| dc.creator | Johannesson, H. | |
| dc.creator | Stafford, C. A. | |
| dc.date | 1999-12-06 | |
| dc.date.accessioned | 2026-07-07T03:15:26Z | |
| dc.date.available | 2026-07-07T03:15:26Z | |
| dc.description | We study the influence of a magnetic impurity or ultrasmall quantum dot on the charge persistent current of a mesoscopic ring. The system consists of electrons in a one-dimensional ring threaded by spin-dependent Aharonov-Bohm/Casher fluxes, coupled via an antiferromagnetic exchange interaction to a localized electron. By passing to a basis of electron states with definite parities, the problem is mapped onto a Kondo model for the even-parity channel plus free electrons in the odd-parity channel. States of opposite parities decouple for values of the flux corresponding to periodic or antiperiodic boundary conditions. For these special cases, the model is solved exactly by a Bethe ansatz, allowing for an exact calculation of the charge persistent current. In particular we show that the charge stiffness in the special case of spin-independent fluxes is insensitive to the presence of the magnetic impurity/quantum dot. | |
| dc.description | To appear in the Proceedings from "Electron Transport in Mesoscopic Physics", J. Low Temp. Phys. (in press); 5 pages | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9912093 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9912093 | |
| dc.identifier | J. Low Temp. Phys. 118, 475 (2000) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/30023 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Kondo Impurity in a Mesoscopic Ring: Charge Persistent Current | |
| dc.type | text |