Optical absorption of angulon in metal halide perovskites

TL;DR

This paper presents a theoretical study of optical absorption in angulons within metal halide perovskites, revealing resonance peaks linked to quantum levels and dependence on phonon angular momentum, offering insights into angular momentum redistribution.

Contribution

It introduces an improved model to analyze angulon optical absorption in MHP, highlighting the role of quantum states and providing new theoretical insights.

Findings

Resonance peaks occur when photon energy matches angulon quantum levels.

Absorption intensity varies with phonon angular momentum states.

Provides understanding of angular momentum redistribution in many-body systems.

Abstract

We theoretically study the optical absorption of an angulon in the metal halide perovskites (MHP) based on the improved Devreese-Huybrechts-Lemmens model, where the formation of quasiparticle angulon states originates from the organic cation rotating in the inorganic octahedral cage of MHP. We find that the resonance optical absorption peaks are appeared when the energy of incident photon matches the quantum levels of angulon. Moreover, the intensity of absorption depends on the quantum states of phonon angular momentum. These theoretical results provide significant insight to study the redistribution of angular momenta for the rotational molecules immersed into the many-body environment.