耦合量子线-量子点体系中的Fano效应  

Fano Effect in Transport Through a Quantum Wire with a Quantum Dot

作　　者：彭权[1] 周利玲[1] 

机构地区：[1]江西师范大学物理与通信电子学院,江西南昌330027

出　　处：《江西师范大学学报（自然科学版）》2010年第1期46-48,77,共4页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(10404010)资助项目

摘　　要：利用非平衡格林函数方法,研究了耦合量子线-量子点体系的相干电子输运性质.研究发现:对于旁耦合一个2能级量子点的量子线的线性电导呈现有趣的电导降中带电导峰的现象;而对于耦合2量子点体系,线性电导表现为有趣的多共振现象.由于Fano干涉,上述电导峰电子的线型不是洛仑兹型的.Using the non-equilibrium green function method, the qualities of coherent electron transport in the system of quantum wire with quantum dot has been studied. Found that the linear conductance in the system of a quantum wire with a side-coupled quantum dot with two level appears very interesting phenomenon, that is, the conductance declines with conductance peak; while, for the system of two quantum dots, the hnear conductance shows very interesting appearance, that is,multi-resonances. Both line styles of the conductance peaks discussed above are not the style of Lorenz because of Fano interference.

关 键 词：量子线 量子点 Fano效应 线性电导 

分 类 号：O413[理学—理论物理]