Infrared absorption of closely aligned heterostructures of monolayer and bilayer graphene with hexagonal boron nitride
Infrared absorption of closely aligned heterostructures of monolayer and bilayer graphene with hexagonal boron nitride
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DOI：
10.1103/physrevb.92.115430
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发表时间：
2015-09-18
影响因子：
3.7
通讯作者：
Mucha-Kruczynski, Marcin
中科院分区：
文献类型：
--
作者：
Abergel, D. S. L.;Mucha-Kruczynski, Marcin
我们模型的单层和双层石墨烯上的六方氮化硼的情况下，紧密对齐的晶格的光吸收。我们发现，具有不同的空间对称性的微扰可以导致相似的吸收光谱。我们建议，作为一个功能的掺杂几乎完全完整的第一个迷你带的吸收光谱的研究是必要的，以提取有意义的信息的莫尔特性从光学吸收测量和区分各种理论建议的物理现实的相互作用。此外，对于双层石墨烯，比较电场诱导的层间不对称性的相反符号的光谱的能力可以提供关于莫尔参数的附加信息。
We model optical absorption of monolayer and bilayer graphene on hexagonal boron nitride for the case of closely aligned crystal lattices. We show that perturbations with different spatial symmetry can lead to similar absorption spectra. We suggest that a study of the absorption spectra as a function of the doping for an almost completely full first miniband is necessary to extract meaningful information about the moire characteristics from optical absorption measurements and to distinguish between various theoretical proposals for the physically realistic interaction. Also, for bilayer graphene, the ability to compare spectra for the opposite signs of electric-field-induced interlayer asymmetry might provide additional information about the moire parameters.