Numerical evidence of diffraction in electronic transmission through a stepped quantum wire

H. Ishio
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引用次数: 2

Abstract

We show a new phenomenon which has been found numerically for coherent electronic transmission through a mesoscopic quantum wire with a step structure. The motion of free electrons in the wire is ballistic with specular reflections from the Dirichlet boundaries. The wire allows only a few modes for electronic transmission. We have found numerically that the electric current shows periodic oscillations with small but nonnegligible amplitudes as a function of a system parameter. We explain that this is purely the effects of diffraction and constructive interference of transmitting electrons at the step structure of the wire.
阶梯式量子线电子传输中衍射的数值证据
我们展示了一种新现象,这是一种通过具有阶梯结构的介观量子线的相干电子传输的数值发现。自由电子在导线中的运动是弹道运动,并从狄利克雷边界反射。电线只允许几种电子传输方式。我们在数值上发现,电流作为系统参数的函数表现出周期振荡,其振幅小但不可忽略。我们解释说,这纯粹是衍射和透射电子在线材阶梯结构上的构相干涉的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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