Modulating magnetism of nitrogen-doped zigzag graphene nanoribbons

doi:10.1088/1674-1056/23/6/067305

Abstract We present a study of electronic properties of zigzag graphene nanoribbons (ZGNRs) substitutionally doped with nitrogen atoms at a single edge by first principle calculations. We find that the two edge states near the Fermi level separate due to the asymmetric nitrogen-doping. The ground states of these systems become ferromagnetic because the local magnetic moments along the undoped edges remain and those along the doped edges are suppressed. By controlling the charge-doping level, the magnetic moments of the whole ribbons are modulated. Proper charge doping leads to interesting half-metallic and single-edge conducting ribbons which would be helpful for designing graphene-nanoribbon-based spintronic devices in the future.

Keywords: graphene nanoribbons charge doping spin-polarization spatial localization

Received: 23 December 2013
Revised: 10 March 2014
Accepted manuscript online:

PACS:	73.22.Pr	(Electronic structure of graphene)
	75.75.-c	(Magnetic properties of nanostructures)
	71.15.Mb	(Density functional theory, local density approximation, gradient and other corrections)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10834012 and 11374342), National Key Basic Research and Development Program of China (Grant No. 2009CB930700), and the Knowledge Innovation Foundation of the Chinese Academy of Sciences (Grant No. KJCX2-YW-W35).

Corresponding Authors: Lü Wen-Gang
E-mail: wglu@iphy.ac.cn

Cite this article:

Zhao Shang-Qian (赵尚骞), Lü Yan (吕燕), Lü Wen-Gang (吕文刚), Liang Wen-Jie (梁文杰), Wang En-Ge (王恩哥) Modulating magnetism of nitrogen-doped zigzag graphene nanoribbons 2014 Chin. Phys. B 23 067305

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