Optical properties of the Hofstadter butterfly in the moire superlattice

Article

关键词: DIRAC FERMIONS;    TRANSPORT;    GRAPHENE;    ELECTRONS;    GRAPHITE;    SPECTRA;   

DOI  :  10.1103/PhysRevB.88.241412

来源: SCIE

【 摘 要 】

We investigate the optical absorption spectrum and the selection rule for the Hofstadter butterfly in twisted bilayer graphene under magnetic fields. We demonstrate that the absorption spectrum exhibits a self-similar recursive pattern reflecting the fractal nature of the energy spectrum. We find that the optical selection rule has a nested self-similar structure as well, and it is governed by the conservation of the total angular momentum summed over different hierarchies.

【 授权许可】

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