摘要
利用格林函数并借助于双杂质的Anderson模型的哈密顿,研究了相干输运通过一嵌入并联耦合量子点(DQD)的非平衡介观电路的磁极化电流的性质,得到了一些新的结果:在有限温度下,磁极化传输电流(MPC)在满足一定的条件会发生方向的反转而突出了MPC对介观电路的磁极化特点,由于加在DQD两端的偏压和电路所处的低温度环境都是实验可以达到的,MPC也达到了利用纳米技术可以观察的程度.
The properties of the magnetic polarization currents （MPC） in parallel-coupled double quantum dots devices are studied by means Of the two-inpurity Anderson Hamihonian and Green function. It is shown that by varying some eonditons such as temperatrue, coupling strength and biase voltage, the direction and magnitude of MPC can be changed, which imply that the magnetic polarization of MPC can affect on submicroscopic circuit. Because of the performance of the bias added to DQD and the lower temperatures in experiments, the MPC will be so large that it can be observed by current nanotechnology.
出处
《四川师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第1期74-77,共4页
Journal of Sichuan Normal University（Natural Science）
基金
四川省应用基础研究和四川省教育厅自然科学重点研究基金资助项目
关键词
磁极化电流
耦合量子点
传输函数
Magnetic polarization currents
Coupled quantum dot
Transmission function
