Infrared absorption by graphene-hBN heterostructures
Infrared absorption by graphene-hBN heterostructures
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DOI：
10.1088/1367-2630/15/12/123009
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发表时间：
2013-12-06
影响因子：
3.3
通讯作者：
Fal'ko, Vladimir I.
中科院分区：
文献类型：
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作者：
Abergel, D. S. L.;Wallbank, J. R.;Fal'ko, Vladimir I.
提出了单层石墨烯-六方氮化硼异质结构的光吸收理论。在高度取向的异质结构中，hBN纳米线为石墨烯电子产生长程莫尔超晶格势，其修改了在红外到可见光频率范围内吸收入射光子的选择规则。吸收光谱修改的细节取决于石墨烯电子和hBN之间的各种自由基允许的耦合的相对强度，以及重建的能带结构的所得性质。
We propose a theory of optical absorption in monolayer graphene-hexagonal boron nitride (hBN) heterostructures. In highly oriented heterostructures, the hBN underlay produces a long-range moire superlattice potential for the graphene electrons which modifies the selection rules for absorption of incoming photons in the infrared to visible frequency range. The details of the absorption spectrum modification depend on the relative strength of the various symmetry-allowed couplings between the graphene electrons and the hBN, and the resulting nature of the reconstructed band structure.