Electronic transport anisotropy of buckling graphene under uniaxial compressive strain: Ab initio study

Electronic transport anisotropy of buckling graphene under uniaxial compressive strain: Ab initio study
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单轴压缩应变下屈曲石墨烯的电子输运各向异性:从头算研究

DOI:
10.1063/1.3680092
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发表时间:
2012-02
影响因子:
4
通讯作者:
Yu, Bin
Yu, Bin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Xu, Yang;Gao, Haiyuan;Chen, Huabin;Yuan, You;Zhu, Kaicheng;Chen, Hongsheng;Jin, Zhonghe;Yu, Bin

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采用从头算方法研究了单轴压缩应变下石墨烯的电子输运性质。近似的热扰动,屈曲发生时,应变超过阈值,比较平坦的未扰动的结构。沿着Z字形方向压缩的扁平石墨烯和沿着扶手椅方向压缩的屈曲石墨烯的透射率对应变不敏感,而屈曲Z字形方向压缩的石墨烯和扁平扶手椅方向压缩的石墨烯的透射率与应变负相关。扁平石墨烯沿应变方向具有各向异性电阻沿着,而屈曲通过释放应变来抑制各向异性。弯曲石墨烯对应变方向和离面变形的不敏感性使得实现柔性电子器件成为可能。
Electronic transport properties of graphene under uniaxial compressive strain are studied using ab initio calculations. With approximate thermal perturbation, buckling occurs when strain exceeds a threshold, comparing to flat unperturbed structures. Transmissions of flat graphene compressed along zigzag direction (ZCG) and buckled graphene compressed along armchair direction (ACG) are insensitive to strain, whereas those of buckled ZCG and flat ACG are negatively correlated to strain. Flat graphene has anisotropic resistance along the strain direction, while buckling suppresses the anisotropy by releasing the strain. The insensitivity of buckled graphene on strain direction and out-of-plane deformation makes feasible to implement flexible electronics.
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