1. Photon assisted electron transport through T-shaped double quantum dot molecule A–B interferometer.
- Author
-
He, Zelong, Bai, Jiyuan, Cui, Lian, Li, Qiang, Han, Guihua, and Zhang, Binlin
- Subjects
- *
ELECTRON transport , *PHOTONS , *QUANTUM dots , *INTERFEROMETERS , *CHEMICAL equilibrium , *GREEN'S functions - Abstract
T-shape double quantum dot molecule A–B interference with the action of time-dependent external field is designed. Using the Keldysh non-equilibrium Green's function method, spin-dependent average current as a function of quantum dot energy is obtained. The magnitude and position of average current resonance peaks can be controlled by adjusting interdot coupling strength, frequency and amplitude of time-dependent electric field. The conversion between zero and non-zero value for average current can be realized under the condition with or without the action of time-dependent external field, respectively, which is the basis for the design of controlled quantum switch. Under the combined action of the external magnetic flux and Rashba spin–orbit coupling strength, the spin-polarized average current can be observed. Dc current–voltage characteristics are researched. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF