Strain-activated edge reconstruction of graphene nanoribbons | Zendy

Yingchun Cheng | Zendy; H. T. Wang | Zendy; Zhiyong Zhu | Zendy; Yihan Zhu | Zendy; Yu Han | Zendy; Xixiang Zhang | Zendy; Udo Schwingenschlögl | Zendy

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Strain-activated edge reconstruction of graphene nanoribbons

Author(s) -

Yingchun Cheng,

H. T. Wang,

Zhiyong Zhu,

Yihan Zhu,

Yu Han,

Xixiang Zhang,

Udo Schwingenschlögl

Publication year - 2012

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.85.073406

Subject(s) - graphene nanoribbons , materials science , zigzag , graphene , antiferromagnetism , band gap , enhanced data rates for gsm evolution , condensed matter physics , ferromagnetism , electronic structure , electronic band structure , nanotechnology , optoelectronics , physics , geometry , telecommunications , computer science , mathematics

The edge structure and width of graphene nanoribbons (GNRs) are crucial factors for the electronic properties. A combination of experiment and first-principles calculations allows us to determine the mechanism of the hexagon-hexagon to pentagon-heptagon transformation. GNRs thinner than 2 nm have been fabricated by bombardment of graphene with high-energetic Au clusters. The edges of the GNRs are modified in situ by electron irradiation. Tensile strain along the edge decreases the transformation energy barrier. Antiferromagnetism and a direct band gap are found for a zigzag GNR, while a fully reconstructed GNR shows an indirect band gap. A GNR reconstructed on only one edge exhibits ferromagnetism. We propose that strain is an effective method to tune the edge and, therefore, the electronic structure of thin GNRs for graphene-based electronics

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