量子线侧耦合量子点的输运特性研究  

The Transmission Properties of a Quantum Wire with a Side-Coupled Quantum Dot

作　　者：冯金福[1] 于静怡[1] 

机构地区：[1]常熟理工学院物理与电子工程学院,江苏常熟215500

出　　处：《常熟理工学院学报》2014年第4期7-10,共4页Journal of Changshu Institute of Technology

基　　金：国家自然科学基金资助项目(11247028)

摘　　要：利用等价单粒子多通道网格方法,研究了量子线侧耦合量子点系统的输运特性.在不同温度、相互作用能和跳跃积分值下,计算得到的电导随门压的变化曲线呈现出反共振电导特性.通过计算电子波的相位特性,得到了反共振特性起源于电子共振和非共振路径干涉的结果.This paper conducts an investigation into the transport properties of a quantum wire with a side-cou-pled quantum dot by means of the equivalent single-particle multi-channel network. The curves of conductance versus the gate voltage are derived with anti-resonant conductance properties for different values of the tempera-ture, the interaction energy and the hopping integral. By calculating the phase features of electronic wave, the re-sults obtained show that the anti-resonance behavior originates from the destructive interference of the directly transmitted wave and the wave reflected by the side-coupled dot.

关 键 词：电导 量子点 反共振 

分 类 号：O488[理学—固体物理]