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arXiv · 1712.09508

The diverse magneto-optical selection rules in bilayer black phosphorus

Jhao-Ying Wu·Szu-Chao Chen·Thi-Nga Do·Wu-Pei Su·Godfrey Gumbs
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Abstract

The magneto-optical properties of bilayer phosphorene is investigated by the generalized tight-binding model and the gradient approximation. The vertical inter-Landau-level transitions, being sensitive to the polarization directions, are mainly determined by the spatial symmetries of sub-envelope functions on the distinct sublattices. The anisotropic excitations strongly depend on the electric and magnetic fields. A perpendicular uniform electric field could greatly diversify the selection rule, frequency, intensity, number and form of symmetric absorption peaks. Specifically, the unusual magneto-optical properties appear beyond the critical field as a result of two subgroups of Landau levels with the main and side modes. The rich and unique magneto-absorption spectra arise from the very close relations among the geometric structures, multiple intralayer and interlayer hopping integrals, and composite external fields.

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Jhao-Ying Wu, Szu-Chao Chen, Thi-Nga Do, Wu-Pei Su, Godfrey Gumbs. 2017-12-27. The diverse magneto-optical selection rules in bilayer black phosphorus. https://arxiv.org/abs/1712.09508

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