电子场发射器件中复合阴极的研究:共振和顺序隧穿的相对贡献

V. Filip, H. Wong, Wing-Shan Tam, C. Kok
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引用次数: 0

摘要

建立了异质结构电子场发射阴极的简单模型,以比较谐振和顺序电子场发射电流。这两个分量通过迭代过程同时计算。该模型假设,在这批电子中,有一定比例的电子未能共振地通过结构,最终将处于准束缚态。研究发现,虽然两种电流场特征都出现了不同的斜率变化,但对于顺序隧穿发射,这些特征仅仅是在电子跃迁到准束缚态之前发生在势能势垒中的干涉效应。因此,在结构中产生各种空间电荷,并对电流的顺序部分和谐振部分产生反作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of composite cathodes in electron field emission devices: Relative contributions of resonant and sequential tunneling
A simple model of a hetero-structured cathode for electron field emission was developed in order to compare resonant and sequential electron field emission currents. These two components were simultaneously computed through an iterative process. The model assumes that a certain fraction of the batch of electrons that failed to resonantly transit the structure will end up in its quasi-bound states. It was found that, while various slope changes appear in both current-field characteristics, for the sequential tunneling emission, such features are merely interference effects occurring in the potential energy barrier, prior to the electron's transition in the quasi-bound states. Thus, various space charges develop in the structure and reacts back on both the sequential and the resonant parts of the current.
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