Nonlinear cotunneling through an artificial molecule

Abstract

We study electron transport through a system of two lateral quantum dots coupled in series. We consider the case of weak coupling to the leads and a bias point in the Coulomb blockade. After a generalized Schrieffer-Wolf transformation, cotunneling through this system is described using methods from lowest-order perturbation theory. We study the system for arbitrary bias voltages below the Coulomb energy. We observe a rich, non-monotonic behavior of the stationary current depending on the internal degrees of freedom. In particular, it turns out that at fixed transport voltage, the current through the system is largest at weak-to-intermediate inter-dot coupling.

4 pages, 5 figures

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Cited by in corpus (5)

• Coherent and Collective Quantum Optical Effects in Mesoscopic Systems
• Spin effects in single electron tunneling
• Probing level renormalization by sequential transport through double quantum dots
• Transport mirages in single-molecule devices
• Nonequilibrium stabilization of charge states in double quantum dots