Time-dependent resonant tunnelling for parallel-coupled double quantum dots
2004; IOP Publishing; Volume: 16; Issue: 24 Linguagem: Inglês
10.1088/0953-8984/16/24/012
ISSN1361-648X
AutoresBing Dong, Ivana Djuric, Hong‐Liang Cui, X. L. Lei,
Tópico(s)Semiconductor Quantum Structures and Devices
ResumoWe 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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