【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.更多还原

【Abstract】 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.更多还原