# Pressure-induced insulator-metal transition in EuMnO3

## TL;DR

This paper investigates how applying external pressure to EuMnO3 causes it to transition from an insulator to a metal, accompanied by magnetic order changes and potential ferroelectric properties.

## Contribution

It reveals the pressure-induced insulator-metal transition and magnetic order changes in EuMnO3 through first-principles calculations, highlighting the possibility of ferroelectric metals.

## Key findings

- Pressure induces insulator-metal transition in EuMnO3.
- Magnetic order changes from A-type antiferromagnetic to ferromagnetic under pressure.
- High-pressure metallic state may host non-centrosymmetric ferroelectric metals.

## Abstract

We study the influence of external pressure on the electronic and magnetic structure of EuMnO3 from first-principles calculations. We find a pressure-induced insulator-metal transition at which the magnetic order changes from A-type antiferromagnetic to ferromagnetic with a strong interplay with Jahn-Teller distortions. In addition, we find that the non-centrosymmetric E*-type antiferromagnetic order can become nearly degenerate with the ferromagnetic ground state in the high-pressure metallic state. This situation can be exploited to promote a magnetically-driven realization of a non-centrosymmetric (ferroelectric) metal.