%0 Journal Article
%T 磁、电受限半导体异质结构中电子的波矢过滤效应<br>Wave-Vector Filtering Effect for Electrons in Magnetically and Electrically Confined Semiconductor Heterostructure
%A 张桂莲
%A 卢卯旺
%A 彭芳芳
%A 孟劲松
%J Optoelectronics
%P 123-132
%@ 2164-5469
%D 2020
%I Hans Publishing
%R 10.12677/OE.2020.104016
%X 研究了磁、电受限半导体异质结构中电子的波矢过滤效应，实验上该结构可通过在GaAs/AlxGa1-xAs异质结表面上平行地沉积铁磁条带和肖特基金属条带实现。利用改进的转移矩阵法求解电子的薛定谔方程获得透射系数，然后透射系数对电子纵向波矢微分计算波矢过滤效率。由于磁纳米结构中电子的运动本质上是一个二维过程，明显的波矢过滤效应出现在这个结构中。波矢过滤效率与肖特基条带的宽度、位置和外加电压密切相关，使得电子的波矢过滤效应变得可操控。因此，这样一个结构可以用作可控的纳米电子动量过滤器。<br />
Wave-vector filtering effect is explored for electrons in magnetically and electrically confined semiconductor heterostructure, which can be realized experimentally by depositing a ferromag-netic stripe and a Schottky metal stripe in parallel configuration on surface of GaAs/AlxGa1-xAs heterostructure. Adopting improved transfer matrix method to solve Schr？dinger equation, electronic transmission coefficient is calculated exactly, and then wave-vector filtering efficiency is obtained by differentiating transmission probability over longitudinal wave-vector. An obvious wave-vector filtering effect appears, due to an essentially two-dimensional process for motion of electrons in magnetic nanostructure. Besides, wave-vector filtering efficiency is associated closely with width, position and externally applied voltage of Schottky metal stripe, which makes wave-vector filtering effect become controllable. Therefore, such a device can serve as a manipulable momentum filter for nanoelectronics.
%K 磁纳米结构，波矢过滤效应，波矢过滤效率，动量过滤器<br>Magnetic Nanostructure
%K Wave-Vector Filtering Effect
%K Wave-Vector Filtering Efficiency
%K Momentum Filter
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=39054