Electron tunneling through serially coupled double quantum dots: The coulomb blockade

International Conference on Materials Engineering and Science

Najdi, M.A.^1 ; Jassem, H.A.^1 ; Al-Mukh, J.M.^2

Physics Department, Collage of Science, Basrah University, Basrah, Iraq^1

Physics Department, Collage of Education for Pure Science, Basrah University, Basrah, Iraq^2

关键词: Differential conductances;    Double quantum dots;    Electronic switches;    Molecular quantum dots;    Occupation numbers;    Tunneling current;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/454/1/012043/pdf
DOI  :  10.1088/1757-899X/454/1/012043

来源: IOP

【 摘 要 】

In this paper we investigate the Coulomb blockade in the electron tunneling through a serially coupled double symmetric quantum dots. All the transport properties such that, the virtual energy levels of the two dots with the corresponding occupation numbers, the tunneling current and the differential conductance are calculate at the case where the interaction between the quantum dots and the leads is weak. From results we find numerically the shape of the coulomb blockade peaks in differential conductance as a function of bias voltage. Finally, we have focused our attention on the effect of the effective exchange interaction on the shape of the differential conductance in blockade regime. Our calculations that related to the Coulomb blockade make it sure that one can use the molecular quantum dots as an electronic switch.