Functionalized Graphene for High-Performance Two-Dimensional Spintronics Devices

被引：114

作者：

Li, Linze

Qin, Rui

Li, Hong

Yu, Lili

Liu, Qihang

Luo, Guangfu

Gao, Zhengxiang

Lu, Jing ^{[1
]}

机构：

[1] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

来源：

ACS NANO | 2011年 / 5卷 / 04期

关键词：

functionalized graphene; spintronics; spin-filter efficiency; magnetoresistance; first-principles calculations; ELECTRONIC-PROPERTIES; ROOM-TEMPERATURE; MAGNETORESISTANCE; 1ST-PRINCIPLES; GRAPHITE; GAS;

D O I：

10.1021/nn102492g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Using first-principles calculations, we explore the possibility of functionalized graphene as a high-performance two-dimensional spintronics device. Graphene functionalized with 0 on one side and H on the other side in the chair conformation is found to be a ferromagnetic metal with a spin-filter efficiency up to 54% at finite bias. The ground state of graphene semifunctionalized with Fin the chair conformation is an anttferromagnetic semiconductor, and we construct a spin-valve device from it by introducing a magnetic field to stabilize its metallic ferromagnetic state. The resulting room temperature magnetoresistance Is up to 2200%, which is 1 order of magnitude larger than the available experimental values.

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页码：2601 / 2610

页数：10

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