多量子点接触中声表面波驱动下的电子输运  

Electron transport driven by surface acoustic wave through multiple quantum point contacts

作　　者：吕倩华[1] 郭华忠[1] 

机构地区：[1]四川大学物理科学与技术学院,成都610064

出　　处：《四川大学学报（自然科学版）》2013年第3期561-565,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金重点项目(11234009);国家科技支撑计划课题(20-1125ZCKF)

摘　　要：本文研究了多量子点接触中声表面波驱动下的电子输运的声电电流特性.改变每个量子点接触的栅电压用以实现不同高度的静态势垒,从而调节声电电流.并用电子泵模型解释了不同势垒之间的耦合对于电流的影响,根据此模型得到的模拟结果与实验吻合.We have investigated the characteristics of the acoustoelectric current induced by surface acoustic wave through multiple quantum point contacts. By changing the gate voltage of each quantum point contact, different potentials will be realized to adjust the acoustoelectric current. The experimental results concerning the influence of coupling among different potentials on current are interpreted by electron pump model. The simulative curves based on this model agree with the experimental data.

关 键 词：声表面波 量子点接触 声电电流 势垒 

分 类 号：O488[理学—固体物理]