Tunable wave-vector filtering in a two-dimensional electron gas modulated by magnetic barriers and δ-doping

被引：11

作者：

Liu, Xu-Hui ^{[1
]}

Liu, Chang-Shi ^{[2
]}

Gong, Yan-Jun ^{[1
]}

Tang, Zheng-Hua ^{[3
]}

机构：

[1] Hunan Univ Sci & Engn, Sch Sci, Yongzhou, Peoples R China

[2] Hunan Univ Commerce, Sch Management, Changsha, Hunan, Peoples R China

[3] Xiangnan Univ, Gospell Joint Lab Microwave Commun Technol, Chenzhou, Peoples R China

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2017年 / 97卷 / 04期

关键词：

Magnetic-barrier (MB) nanostructure; delta-doping; wave-vector filtering (WVF) effect; WVF efficiency; tunable momentum filter; GIANT MAGNETORESISTANCE; SPIN POLARIZATION; TRANSPORT; FIELD;

D O I：

10.1080/09500839.2017.1300350

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a theoretical investigation on the control of wave-vector filtering (WVF) in a two-dimensional electron gas modulated by realistic magnetic barriers and d-doping, which can be experimentally realised by depositing a ferromagnetic stripe on the surface of a GaAs/AlxGa1-x As heterostructure and using atomic layer doping. Theoretical analysis demonstrates that a sizeable WVF effect still exists even if d-doping is introduced into the device. Numerical calculation reveals that the WVF efficiency is related closely to the d-doping. Thus, the WVF effect in a magnetic nanostructure can be conveniently manipulated by properly adjusting the weight and/or the position of the d-doping, giving rise to a tunable momentum filter for nanoelectronics applications.

引用

页码：150 / 157

页数：8

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