Tunable Magnetism and Insulator-Metal Transition in Bilayer Perovskites

TL;DR

This paper predicts tunable ferromagnetism and insulator-metal transitions in bilayer perovskites using density functional theory, highlighting potential applications in spintronics and straintronics.

Contribution

It introduces a theoretical prediction of controllable magnetic and electronic phase transitions in bilayer perovskites under strain and electric fields.

Findings

Ferromagnetism can be induced in bilayer $KNbO_{3}$ and $KTaO_{3}$.

Insulator-metal phase transition can be achieved via strain or electric field.

Potential applications in spintronics and straintronics.

Abstract

Two-dimensional (2D) transition-metal oxide perovskites greatly expand the field of available 2D multifunctional material systems. Here, based on density functional theory calculations, we predicted the presence of ferromagnetism orders accompanying with an insulator-metal phase transition in bilayer $KNbO_{3}$ and $KTaO_{3}$ by applying strain engineering and/or external electric field. Our results will contribute to the applications of few-layer transition metal oxide perovskites in the emerging spintronics and straintronics.