Velocity modulation of electron transport through a ferromagnetic silicene junction

doi:10.1088/1674-1056/25/3/037309

中国物理B ›› 2016, Vol. 25 ›› Issue (3): 37309-037309.doi: 10.1088/1674-1056/25/3/037309

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Velocity modulation of electron transport through a ferromagnetic silicene junction

Huai-Hua Shao(邵怀华), Dan Guo(郭丹), Ben-Liang Zhou(周本良), Guang-Hui Zhou(周光辉)

1. Department of Physics and Key Laboratory for Low-Dimensional Structures and Quantum Manipulation (Ministry of Education), Hunan Normal University, Changsha 410081, China;
2. Department of Physics and Electronic Science, Liupanshui Normal University, Liupanshui 553004, China

收稿日期:2015-11-05 修回日期:2015-12-05 出版日期:2016-03-05 发布日期:2016-03-05
通讯作者: Guang-Hui Zhou E-mail:ghzhou@hunnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11274108).

Velocity modulation of electron transport through a ferromagnetic silicene junction

Huai-Hua Shao(邵怀华)^1,2, Dan Guo(郭丹)¹, Ben-Liang Zhou(周本良)¹, Guang-Hui Zhou(周光辉)¹

1. Department of Physics and Key Laboratory for Low-Dimensional Structures and Quantum Manipulation (Ministry of Education), Hunan Normal University, Changsha 410081, China;
2. Department of Physics and Electronic Science, Liupanshui Normal University, Liupanshui 553004, China

Received:2015-11-05 Revised:2015-12-05 Online:2016-03-05 Published:2016-03-05
Contact: Guang-Hui Zhou E-mail:ghzhou@hunnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11274108).

摘要/Abstract

摘要：

We address velocity-modulation control of electron wave propagation in a normal/ferromagnetic/normal silicene junction with local variation of Fermi velocity, where the properties of charge, valley, and spin transport through the junction are investigated. By matching the wavefunctions at the normal-ferromagnetic interfaces, it is demonstrated that the variation of Fermi velocity in a small range can largely enhance the total conductance while keeping the current nearly fully valley-and spin-polarized. Further, the variation of Fermi velocity in ferromagnetic silicene has significant influence on the valley and spin polarization, especially in the low-energy regime. It may drastically reduce the high polarizations, which can be realized by adjusting the local application of a gate voltage and exchange field on the junction.

关键词: ferromagnetic silicene junction, electron transport, velocity modulation

Abstract:

Key words: ferromagnetic silicene junction, electron transport, velocity modulation

中图分类号: (Quantum phase transitions)

73.43.Nq

72.25.Dc (Spin polarized transport in semiconductors) 85.75.-d (Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

邵怀华, 郭丹, 周本良, 周光辉. Velocity modulation of electron transport through a ferromagnetic silicene junction[J]. 中国物理B, 2016, 25(3): 37309-037309.

Huai-Hua Shao(邵怀华), Dan Guo(郭丹), Ben-Liang Zhou(周本良), Guang-Hui Zhou(周光辉). Velocity modulation of electron transport through a ferromagnetic silicene junction[J]. Chin. Phys. B, 2016, 25(3): 37309-037309.

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Velocity modulation of electron transport through a ferromagnetic silicene junction

Velocity modulation of electron transport through a ferromagnetic silicene junction

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