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Infrared and Raman spectra of AA-stacking bilayer graphene

机译:AA堆叠双层石墨烯的红外和拉曼光谱

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摘要

The infrared (IR) absorption and resonant Raman spectra of the undoped AA-stacking bilayer graphene have been calculated using density-functional theory in the local density approximation. It is found that the undoped AA-stacking bilayer graphene exhibits a different characteristic jump and peak structure in its IR spectra, and a different G-band peak structure in its resonant Raman spectra, compared with those of the AB-stacking one, which are caused by the different interlayer coupling effects, due to different stacking types in both of them. Based upon the different IR and Raman spectra, a powerful experimental method can be proposed to identify accurately the stacking type and the layer number in future experiments.
机译:在局部密度近似中,使用密度泛函理论计算了未掺杂的AA堆叠双层石墨烯的红外(IR)吸收和共振拉曼光谱。结果发现,与AB叠层的石墨烯相比,未掺杂的AA叠层的石墨烯在其IR光谱中表现出不同的特征跃迁和峰结构,在共振拉曼光谱中表现出不同的G带峰结构。由于层间耦合效应不同,这是由于两者的堆叠类型不同。基于不同的红外光谱和拉曼光谱,可以提出一种功能强大的实验方法,以在将来的实验中准确识别堆叠类型和层数。

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