Extreme disorder in crystalline perovskite oxide: a new paradigm in quantum materials research

TL;DR

This paper reviews how introducing extreme chemical disorder through high entropy oxides in perovskite structures creates new opportunities for discovering novel electronic and magnetic phenomena, expanding the landscape of quantum materials research.

Contribution

It provides a comprehensive overview of recent progress in synthesizing and characterizing high entropy perovskite oxides and explores their potential for new physical phenomena.

Findings

High entropy oxides enable access to previously inaccessible physical states.

Chemical disorder in perovskites leads to novel electronic and magnetic properties.

Recent advances suggest promising future research directions.

Abstract

Perovskite oxides ($AB$O$_3$) have long been central to the advancement of modern condensed matter physics, owing to their rich and tunable electronic and magnetic properties. The quest to understand their various entangled phases has spurred the development of both cutting-edge experimental tools and innovative theoretical frameworks. In recent times, the emergence of high entropy oxides - materials in which five or more elements share a single crystallographic site - has introduced a powerful new paradigm in materials design. Embedding such extreme chemical disorder within the perovskite framework has opened vast opportunities for realizing novel physical phenomena inaccessible in conventional oxides. This review surveys the rapid advances in the synthesis, characterization, and exploration of the electronic and magnetic properties of compositionally complex perovskite oxides, offering key insights and highlighting promising avenues for future research.