Rashba and Dresselhaus Effects in Hybrid Organic–Inorganic Perovskites: From Basics to Devices

TLDR

Hybrid organic‑inorganic halide perovskites are central to the photovoltaic revolution and show promise for optoelectronic devices, while their strong spin‑orbit coupling suggests potential for spin‑based applications. The authors aim to determine the origin of spin splitting in two‑ and three‑dimensional hybrid perovskites by examining their electronic structures and bulk lattice symmetries. They employ symmetry analysis, density functional theory calculations, and k·p modeling of electronic structures and lattice symmetries to scrutinize Rashba and Dresselhaus effects in these materials. Low‑dimensional CH₃NH₃PbX₃ (X = I, Br) nanostructures exhibit electric‑field‑controlled spin splittings, opening a path toward perovskite‑based spintronics.

Abstract

We use symmetry analysis, density functional theory calculations, and k·p modeling to scrutinize Rashba and Dresselhaus effects in hybrid organic-inorganic halide perovskites. These perovskites are at the center of a recent revolution in the field of photovoltaics but have also demonstrated potential for optoelectronic applications such as transistors and light emitters. Due to a large spin-orbit coupling of the most frequently used metals, they are also predicted to offer a promising avenue for spin-based applications. With an in-depth inspection of the electronic structures and bulk lattice symmetries of a variety of systems, we analyze the origin of the spin splitting in two- and three-dimensional hybrid perovskites. It is shown that low-dimensional nanostructures made of CH3NH3PbX3 (X = I, Br) lead to spin splittings that can be controlled by an applied electric field. These findings further open the door for a perovskite-based spintronics.