文献类型：期刊文献

中文题名：T型三端磁性隧道结中散粒噪声及自旋输运性质的研究

英文题名：Study on Spin-dependent Shot Noise in F/S/F Three-terminal Heterojunction

作者：黄政 王德贵

第一作者：黄政

机构：[1]贵州理工学院电气工程学院;[2]贵州大学光电子技术及应用重点实验室

第一机构：贵州理工学院电气与信息工程学院

年份：2015

卷号：37

期号：2

起止页码：121-125

中文期刊名：武汉理工大学学报

外文期刊名：Journal of Wuhan University of Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；

基金：国家自然科学基金(10865003);贵州省科学技术基金项目(黔科合J字[2014]2078号);贵州工业发展研究中心课题(GZGY20140701)

语种：中文

中文关键词：散粒噪声;隧道结;透射系数

外文关键词：shot noise; tunneling junctions; transmission coefficient

摘要：在外磁场存在条件下,对T型三端铁磁/半导体/铁磁异质结中的散粒噪声及其自旋输运性质进行了研究。考虑了铁磁体与半导体界面处存在δ型势垒、半导体中的自旋轨道耦合效应、量子尺寸效应对输运性质的影响,结果表明,相比二端口异质结,三终端各端的噪声均有所下降,并且各端口间相互关联,出现此消彼长的现象,加入外磁场时,不同终端的散粒噪声随磁场强度的增大均做振幅变化的周期性振荡,并且相位相反。这些特点可以为设计新型自旋量子器件提供参考。
The shot noise and transmission coefficients of electron tunneling were studied theoretically through the F/S/F three-terminal heterojunction in the presence of Rashba spin-orbit interaction.The effects of the quantum size and Rashba spin-orbit coupling were discussed.It is shown that the average of the shot noise as well as the oscillation frequency for three-terminal heterojunction is less than that for the traditional two terminal heterojunction because the three-terminal heterojunction decreases the transmission probability of each terminal.Moreover,the amplitude of the shot noise will change as the increase of magnetic field intensity.These results may be useful for the understanding and the designing of quantum spintronic devices.