CUED Publications database

Coulomb effects in tunneling through a quantum dot stack

Sprekeler, H and Kießlich, G and Wacker, A and Schöll, E (2004) Coulomb effects in tunneling through a quantum dot stack. Physical Review B - Condensed Matter and Materials Physics, 69. pp. 1253281-1253286. ISSN 1098-0121

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Tunneling through two vertically coupled quantum dots is studied by means of a Pauli master equation model. The observation of double peaks in the current-voltage characteristic in a recent experiment is analyzed in terms of the tunnel coupling between the quantum dots and the coupling to the contacts. Different regimes for the emitter chemical potential indicating different peak scenarios in the tunneling current are discussed in detail. We show by comparison with a density matrix approach that the interplay of coherent and incoherent effects in the stationary current can be fully described by this approach. © 2004 The American Physical Society.

Item Type: Article
Divisions: Div F > Computational and Biological Learning
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:21
Last Modified: 05 Apr 2018 02:37