Electronic structures for armchair-edge graphene nanoribbons under a small uniaxial strain

论文发布时间：[2010-01-20] 范文大全编辑：Voive.net

所有作者：廖文虎周本胡周光辉

作者单位：湖南师范大学物理系

论文摘要：We theoretically investigate the electronic structures for armchair-edge graphene nanoribbons (AGNRs) under a small in-plane uniaxial strain along armchair (longitudinal) and zigzag (transversal) direction， respectively。 We demonstrate that， by both the tight-binding calculation and first-principles study， the applying of a small asymmetrical strain results in variation of energy subband spacing， which opens a band gap for metallic AGNRs and modifies the band gaps for semiconducting AGNRs near the Fermi level。 It is believed that these results are of importance in the band gap engineering and electromechanical applications of graphene-nanoribbon-based devices。

关键词： GNRs strain electronic structure

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