Time-dependent resonant tunneling for a parallel-coupled double quantum dots

Details Time-dependent resonant tunneling for a parallel-coupled double quantum dots Time-dependent resonant tunneling for a parallel-coupled double quantum dots

2004-03-30

arxiv.org/abs/cond-mat/0403741v1

J. Phys.: Cond. Matter 16, 4303 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 5 figures

Scientific paper

10.1088/0953-8984/16/24/012

We derive the quantum rate equations for an Aharonov-Bohm interferometer with two vertically coupled quantum dots embedded in each of two arms by means of the nonequilibrium Green's function in the sequential tunneling regime. Basing on these equations, we investigate time-dependent resonant tunneling under a small amplitude irradiation and find that the resonant photon-assisted tunneling peaks in photocurrent demonstrate a combination behavior of Fano and Lorentzian resonances due to the interference effect between the two pathways in this parallel configuration, which is controllable by threading the magnetic flux inside this device.

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