Tristability in a non-equilibrium double-quantum-dot in the Kondo regime

Lara, GA; Orellana, PA; Anda, EV

Abstract

Electron tunneling through a non-equilibrium double quantum dot in the Kondo regime is studied. In the region of negative differential resistance, it is shown that this system possesses a complex response to the applied potential characterized by a tristable solution for the current. Increasing the applied potential or reducing the inter-dot coupling, the system goes through a transition from a coherent inter-dot regime to an incoherent one. The different nature of the solutions is characterized and it is shown that the effects of the asymmetry in the dot-lead coupling can be used to control the region of multistability. The mean-field slave-boson formalism is used to obtain the solution of the problem. (C) 2003 Elsevier Science Ltd. All rights reserved.

Más información

Título según WOS: Tristability in a non-equilibrium double-quantum-dot in the Kondo regime
Título de la Revista: SOLID STATE COMMUNICATIONS
Volumen: 125
Número: 3-4
Editorial: PERGAMON-ELSEVIER SCIENCE LTD
Fecha de publicación: 2003
Página de inicio: 165
Página final: 169
DOI:

10.1016/S0038-1098(02)00766-4

Notas: ISI