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Functionalized graphene for high-performance two-dimensional spintronics devices.

Authors
  • Li, Linze1
  • Qin, Rui
  • Li, Hong
  • Yu, Lili
  • Liu, Qihang
  • Luo, Guangfu
  • Gao, Zhengxiang
  • Lu, Jing
  • 1 State Key Laboratory of Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, People's Republic of China. , (China)
Type
Published Article
Journal
ACS Nano
Publisher
American Chemical Society
Publication Date
Apr 26, 2011
Volume
5
Issue
4
Pages
2601–2610
Identifiers
DOI: 10.1021/nn102492g
PMID: 21395280
Source
Medline
License
Unknown

Abstract

Using first-principles calculations, we explore the possibility of functionalized graphene as a high-performance two-dimensional spintronics device. Graphene functionalized with O 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 F in the chair conformation is an antiferromagnetic 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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