Fully spin-polarized current in gated bilayer silicene

被引：17

作者：

Ouyang, Xiao-Fang ^{[1
,2
]}

Song, Ze-Yi ^{[1
]}

Zhang, Yu-Zhong ^{[1
]}

机构：

[1] Tongji Univ, Sch Phys Sci & Engn, Shanghai Key Lab Special Artificial Microstruct M, Shanghai 200092, Peoples R China

[2] Xinyu Univ, Sch New Energy Sci & Engn, Xinyu 338000, Jiangxi, Peoples R China

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 07期

基金：

中国国家自然科学基金;

关键词：

TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET;

D O I：

10.1103/PhysRevB.98.075435

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By applying density functional theory calculations, we predict that the ground state of bilayer silicene at certain interlayer distances can be antiferromagnetic. At small electron or hole doping, it becomes half metallic under applied out-of-plane electric field, which can be used to produce a fully spin-polarized field-effect-driven current even in the absence of an external magnetic field, ferromagnetic substrates, doped magnetic ions, or spin-orbital coupling. Our finding points out a route to overcome the major challenge of spintronics.

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页数：6

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