Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-09-30
Phys. Rev. B 69, 125328 (2004)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, 6 figures
Scientific paper
10.1103/PhysRevB.69.125328
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.
Kiesslich Gerold
Schoell Eckehard
Sprekeler H.
Wacker Andreas
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