Modeling many-body dispersion interactions for rare-earth halide perovskites
Year: 2025
Type: article
Abstract: Rare-earth halide perovskites (REHP) have gained increasing attention due to their unique structures and properties. However, their accurate study poses a significant challenge from both theoretical and experimental point of view. Here, we investigate the structural, electronic and thermodynamic properties of RE-based perovskites (CsREI 3 , [Formula: see text], Eu and Yb) using first-principles density-functional theory approaches. In particular, we employ a recently developed many-body dispersion model for bulk systems (MBD-[Formula: see text]) to understand nonlocal van der Waals (vdW) interactions in the perovskite materials. Our results suggest an adequate treatment of screening effects is an effective way of alleviating the overbinding issue observed by broadly employed vdW approaches, highlighting the importance of many-body dispersion interactions in predicting crystal structures. Electronic properties and phonon vibrations are further investigated and care has been taken to capture anharmonicity and spin-orbit coupling (SOC) effects in REHP. We demonstrate that the SOC contribution plays a significant role in determining the electronic structure of CsYbI 3 .
Source: Journal of Advanced Dielectrics
Authors: Zhen-Yu Miao, Lei Jia, Alberto Ambrosetti, Guo-Xu Zhang
Institutions: Harbin Institute of Technology, University of Padua
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4417517399