Kondo effect on tunneling currents in a mesoscopic ring
We study the effect of the Kondo resonance on the tunneling current oscillations in a mesoscopic ring with a quantum dot, threaded by an external magnetic flux. Two situations are considered: the isolated ring and the ring connected to two external contacts. The system is described by an Anderson im...
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| Autores principales: | , , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03048853_v177-181_nPART1_p313_Davidovich |
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| Sumario: | We study the effect of the Kondo resonance on the tunneling current oscillations in a mesoscopic ring with a quantum dot, threaded by an external magnetic flux. Two situations are considered: the isolated ring and the ring connected to two external contacts. The system is described by an Anderson impurity tight-binding Hamiltonian where the electron-electron interaction is restricted to the dot. It is shown that at low temperature, even with the system out of resonance, the Kondo peak provides a channel for the electron to tunnel through the dot giving rise to persistent currents, for the isolated ring and to the Bohm-Aharonov oscillations, for the ring electrically connected. © 1998 Elsevier Science B.V. All rights reserved. |
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