Transport properties in MoS2 quantum dot under time-oscillating potential

Abstract

Abstract We report a theoretical study of transport properties in a circular MoS2 quantum dot under spin-orbit coupling and time-periodic potential. It is shown that the scattering coefficient depends on the frequency ( ω ) and the amplitude of the time-periodic potential ( V ˜ ) as well as the radius of the quantum dot (R), and has an oscillatory behavior with respect to ω , V ˜ and R. Also, the scattering coefficient is dependent on the order of the sideband as well as the sign of the sideband. Results show that for n > 1 ( n < − 1 ), the scattering is negligible for the large frequency values. Interestingly, the magnitude of radial reflected current can be efficiently controlled by the quantum dot coordinates. Thus, a circular MoS2 quantum dot with a time-oscillating potential can temporarily trap electrons. These results clarify that a circular MoS2 quantum dot can be useful for the design of novel electronic devices.