Tunable magnetism in strained graphene with topological line defect

Kou, Liangzhi, Tang, Chun, Guo, Wanlin, & Chen, Changfeng (2011) Tunable magnetism in strained graphene with topological line defect. ACS Nano, 5(2), pp. 1012-1017.

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Abstract

We examine the magnetic properties of two-dimensional graphene with topological line defect using first-principles calculations and predict a weak ferromagnetic ground state with spin-polarized electrons localized along the extended line defect. Our results show that tensile strain along the zigzag direction can greatly enhance local magnetic moments and ferromagnetic stability of the system. In sharp contrast, tensile strain applied along the armchair direction quickly diminishes these magnetic moments. A detailed analysis reveals that this intriguing magnetism modulation by strain stems from the redistribution of spin-polarized electrons induced by local lattice distortion. It suggests a sensitive and effective way to control magnetic properties of graphene which is critical for its applications in nanoscale devices.

Impact and interest:

90 citations in Scopus
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85 citations in Web of Science®

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ID Code: 98226
Item Type: Journal Article
Refereed: Yes
Keywords: graphene, magnetism modulation, strain control, topological line defect
DOI: 10.1021/nn1024175
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 26 Aug 2016 05:17
Last Modified: 01 Sep 2016 00:34

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