Bloch定理在单层石墨烯多势阱结构体系中的应用  

Bloch theorem used in mono-layer graphene with multi-barriers structure

作　　者：杨翠红[1] 王璐[1] 雷勇[1] 罗媛[1] 

机构地区：[1]南京信息工程大学物理与光电工程学院,江苏南京210044

出　　处：《大学物理》2015年第1期6-8,共3页College Physics

基　　金：江苏省自然科学基金项目(BK20131428);江苏省高校"青蓝工程"项目;教育部留学回国人员科研启动基金资助

摘　　要：石墨烯材料中观测到Klein隧穿效应,也因其特殊的光学、电学等特性而被广泛研究.本文设计了等高的多势垒体系来分析载流子的隧穿效应.由Bloch定理得到周期性势垒结构中的能带结构,分析载流子的状态和共振隧穿区.数值研究结果表明,通过调制势垒、势阱宽度、势垒高度、以及载流子入射能量等参数来获得所需的隧穿概率,并可进一步分析电导特性.Klein tunneling effect is observed in graphene. It is widely investigated because of its special optical and electrical properties. The multi- barrier structure with the same height is designed to andalyze the tunneling effect. Using the Bloch theorem,the carrier energy band with periodic barrier structure is obtained. The resonant tunneling area can be analyzed from the energy spectrum. The numerical results indicated that the required tunneling probability can be tuned by the width and the height of the barriers and wells,and the incident energy. The conductance properties can be further investigated.

关 键 词：BLOCH定理 石墨烯 隧穿效应 

分 类 号：O413.1[理学—理论物理]