The Landé factors of electrons and holes in lead halide perovskites: universal dependence on the band gap

E. Kirstein; D. R. Yakovlev; M. M. Glazov; E. A. Zhukov; D. Kudlacik; I. V. Kalitukha; V. F. Sapega; G. S. Dimitriev; M. A. Semina; M. O. Nestoklon; E. L. Ivchenko; N. E. Kopteva; D. N. Dirin; O. Nazarenko; M. V. Kovalenko; A. Baumann; J. Höcker; V. Dyakonov; M. Bayer

doi:10.1038/s41467-022-30701-0

paper

The Landé factors of electrons and holes in lead halide perovskites: universal dependence on the band gap

arXiv:2112.15384 · doi:10.1038/s41467-022-30701-0

Abstract

The Landé or $g$ -factors of charge carriers are decisive for the spin-dependent phenomena in solids and provide also information about the underlying electronic band structure. We present a comprehensive set of experimental data for values and anisotropies of the electron and hole Landé factors in hybrid organic-inorganic (MAPbI $_{3}$ , MAPb(Br $_{0.5}$ Cl $_{0.5}$ ) $_{3}$ , MAPb(Br $_{0.05}$ Cl $_{0.95}$ ) $_{3}$ , FAPbBr $_{3}$ , FA $_{0.9}$ Cs $_{0.1}$ PbI $_{2.8}$ Br $_{0.2}$ ) and all-inorganic (CsPbBr $_{3}$ ) lead halide perovskites, determined by pump-probe Kerr rotation and spin-flip Raman scattering in magnetic fields up to 10~T at cryogenic temperatures. Further, we use first-principles DFT calculations in combination with tight-binding and $k \cdot p$ approaches to calculate microscopically the Landé factors. The results demonstrate their universal dependence on the band gap energy across the different perovskite material classes, which can be summarized in a universal semi-phenomenological expression, in good agreement with experiment.

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Accessing the conduction band dispersion in CH3NH3PbI3 single crystals

The Landé factors of electrons and holes in lead halide perovskites: universal dependence on the band gap

Abstract

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