Resonant Photon-Assisted Tunneling Through a Coupled Double-Quantum-Dot System |
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Authors: | DU ShangFeng SUN QingFeng LIN TsungHan |
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Institution: | 1. Department of Physics, Peking University, Beijing 100871, China;
2. Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China |
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Abstract: | An analytical formula of the tunneling current through a coupled double-quantumdot system in the presence of a time-dependent electric field is obtained by using the Keldysh nonequilibrium Green's function technique. The dependence of the time-averaged current on the frequency of the electric field, as well as the dependence of the multiphoton assisted tunneling on the strength of the electric field are studied. The features of I-Vdc characteristic are also investigated. Besides, we present a simplified formula which can be used to determine the heights of the resonant peaks conveniently. |
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Keywords: | resonant tunneling photon-assisted double-quantum-dot |
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