The Kondo effect in Bohm-Aharonov resonant tunneling devices

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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 desc...

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Detalles Bibliográficos
Autores principales: Iglesias, J.R., Anda, E.V., Davidovich, M.A., Chiappe, G.
Formato: JOUR
Materias:
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 temperature
Magnetic flux
Resonant tunneling devices
Electron tunneling
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09214526_v230-232_n_p478_Iglesias
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario: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.

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