Double-periodic quasi-periodic graphene superlattice: non-Bragg band gap and electronic transport
Double-periodic quasi-periodic graphene superlattice: non-Bragg band gap and electronic transport
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DOI：
10.1088/0022-3727/46/1/015306
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发表时间：
2012-09
期刊：
影响因子：
--
通讯作者：
Xi Chen;Peiliang Zhao;Qi-Biao Zhu
中科院分区：
文献类型：
--
作者：
Xi Chen;Peiliang Zhao;Qi-Biao Zhu
研究了双周期序列准周期石墨烯超晶格（GSL）中的电子带隙和输运性质。结果表明，这种准周期结构可以具有零平均波数（零）间隙，这与一个不寻常的狄拉克点有关。与布喇格带隙不同，零带隙对入射角不敏感，对晶格常数具有鲁棒性。比较了各种序列的GSL中Dirac点和多Dirac点的位置。在GSL中的零带隙上控制电子传输可以促进许多基于石墨烯的电子器件的开发。
Electronic band gap and transport in quasi-periodic graphene superlattice (GSL) of double-periodic sequence are investigated. It is found that such quasi-periodic structure can possess a zero-averaged wave-number (zero- ) gap which is associated with an unusual Dirac point. Different from Bragg gap, the zero- gap is less sensitive to the incidence angle, and robust against the lattice constants. The locations of Dirac point and multi-Dirac-points in the GSLs of various sequences are also compared. The control of electron transport over the zero- band gap in GSLs may facilitate the development of many graphene-based electronics.