The Bohm-Aharonov effect in a mesoscopic ring containing a double-barrier structure in its upper part is investigated. The interference between electrons propagating along different sides of the ring is modified by the presence of a double barrier. A local Coulomb interaction, U, is included to describe the highly localized electrons at the well and an Abrikosov-Suhl (AS) resonance appears at low temperatures. So, in this energy range the current is flux dependent. Above the Kondo temperature TK the AS resonance disappears and the flux-independent behavior is recovered. The current is studied as a function of magnetic flux, gate potential and position of the Fermi level.
Documento: | Artículo |
Título: | The Kondo effect in Bohm-Aharonov resonant tunneling devices |
Autor: | Iglesias, J.R.; Anda, E.V.; Davidovich, M.A.; Chiappe, G. |
Filiación: | Instituto de Física, Univ. Federal do Rio Grande do Sul, C.P. 15051, 91501-970 Porto Alegre, Brazil Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, Brazil Departamento de Física, Pont. Univ. Catol. do Rio de Janeiro, C.P. 38071, 22452-970, Rio de Janeiro, Brazil Departamento de Física, Universidad de Buenos Aires, C.P. 1428, Nuñez, Buenos Aires, Argentina |
Palabras clave: | Bohm-Aharonov effect; Kondo effect; Kondo resonance; Mesoscopic ring; Electric currents; Electron resonance; Fermi level; Magnetic field effects; Thermal effects; Abrikosov Suhl resonance; Bohm Aharonov effect; Coulomb interactions; Kondo effect; Kondo resonance; Kondo temperature; Magnetic flux; Resonant tunneling devices; Electron tunneling |
Año: | 1997 |
Volumen: | 230-232 |
Página de inicio: | 478 |
Página de fin: | 481 |
DOI: | http://dx.doi.org/10.1016/S0921-4526(96)00634-5 |
Título revista: | Physica B: Condensed Matter |
Título revista abreviado: | Phys B Condens Matter |
ISSN: | 09214526 |
CODEN: | PHYBE |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v230-232_n_p478_Iglesias |