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We investigate the figure of merit of a quantum dot (QD) system irradiated with an external microwave filed by nonequilibrium Greenʼs function (NGF) technique. Results show that the frequency of microwave field influence the figure of merit ZT significantly. At low temperature, a sharp peak can be observed in the figure of merit ZT as the frequency of ac field increases. As the frequency varies, several...
We have investigated the current for the system of vibrating quantum dot irradiated with a rotating magnetic field and an oscillating magnetic field by nonequilibrium Green's function. The rotating magnetic field rotates with the angular frequency ωr around the z-axis with the tilt angle ϑ, and the time-oscillating magnetic field is located in the z-axis with the angular frequency ω. Different behaviors...
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