Velocity modulation of electron transport through a ferromagnetic silicene junction

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

Abstract

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.

Keywords: ferromagnetic silicene junction electron transport velocity modulation

Received: 05 November 2015
Revised: 05 December 2015
Accepted manuscript online:

PACS:	73.43.Nq	(Quantum phase transitions)
	72.25.Dc	(Spin polarized transport in semiconductors)
	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

Fund:

Project supported by the National Natural Science Foundation of China (Grant No. 11274108).

Corresponding Authors: Guang-Hui Zhou
E-mail: ghzhou@hunnu.edu.cn

Cite this article:

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 2016 Chin. Phys. B 25 037309

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