三端耦合多量子点体系的电输运  

Transport through three-terminal coupled multi-quantum-dot system

作　　者：韩晶[1] 李鹏[1] 张迪[2] 

机构地区：[1]黑龙江工程学院电子工程系,黑龙江哈尔滨150050 [2]哈尔滨师范大学物理与电子工程学院,黑龙江哈尔滨150025

出　　处：《黑龙江工程学院学报》2011年第1期40-42,46,共4页Journal of Heilongjiang Institute of Technology

基　　金：黑龙江省青年科学基金项目(QC2009C41)

摘　　要：设计一个三端耦合多量子点体系的模型。利用非平衡格林函数的运动方程与Dyson方程,计算出通过体系的电流表达式。对体系的电输运性质进行研究,发现一些有趣的结论:当边耦合奇数个量子点时,随着量子点数目的增加,单量子点能级处对应的共振峰逐渐发生劈裂;当边耦合偶数个量子点时,单量子点能级处总能出现一个完全共振峰。The model of three-terminal coupled multi-quantum-dot system is designed.We have obtained the current formula of the system through the use of Dyson equations and equations of motion method for Green functions.Electron transport property through the system is investigated.Some interesting results are found： first,the resonance peak lying at the single-dot energy level begins to split with the increasing of the number of quantum dot when the number of quantum dot in the side-coupled quantum-dot wire is odd number;second,one resonant peak always lies at the single-dot energy level once that the number of quantum dot in the side-coupled quantum-dot wire is even number.

关 键 词：量子点线 非平衡格林函数 电输运 透射概率 

分 类 号：O469[理学—凝聚态物理]