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arXiv · 2204.04022

Effective model for studying optical properties of lead-halide perovskites

Artem G. Volosniev·Abhishek Shiva Kumar·Dusan Lorenc·Younes Ashourishokri·Ayan A. Zhumekenov·Osman M. Bakr·Mikhail Lemeshko·Zhanybek Alpichshev
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Abstract

We use general symmetry-based arguments to construct an effective model suitable for studying optical properties of lead-halide perovskites. To build the model, we identify an atomic-level interaction between electromagnetic fields and the spin degree of freedom that should be added to a minimally-coupled $\mathbf{k\cdot p}$ Hamiltonian. As a first application, we study two basic optical characteristics of the material: the Verdet constant and the refractive index. Beyond these linear characteristics of the material the model is suitable for calculating non-linear effects such as the third-order optical susceptibility. Analysis of this quantity shows that the geometrical properties of the spin-electric term imply isotropic optical response of the system, and that optical anisotropy of lead-halide perovskites is a manifestation of hopping of charge carriers. To illustrate this, we discuss third-harmonic generation.

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Artem G. Volosniev, Abhishek Shiva Kumar, Dusan Lorenc, Younes Ashourishokri, Ayan A. Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, Zhanybek Alpichshev. 2022-04-08. Effective model for studying optical properties of lead-halide perovskites. https://doi.org/10.1103/physrevb.107.125201

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