Electron gas at the interface between two antiferromagnetic insulating manganites

TL;DR

This paper theoretically investigates the magnetic and electronic properties at the interface of two antiferromagnetic insulating manganites, revealing the formation of a ferromagnetic, metallic electron gas with potential for doping-induced density control.

Contribution

It demonstrates the emergence of a ferromagnetic, metallic electron gas at the interface between La0.5Ca0.5MnO3 and CaMnO3, a novel finding in manganite heterostructures.

Findings

Formation of a ferromagnetic, metallic electron gas at the interface.

Confirmation of metallic conductance through in-plane calculations.

Discussion of doping strategies to increase electron gas density.

Abstract

We study theoretically the magnetic and electric properties of the interface between two antiferromagnetic and insulating manganites: La0.5Ca0.5MnO3, a strong correlated insulator, and CaMnO3, a band-insulator. We find that a ferromagnetic and metallic electron gas is formed at the interface between the two layers. We confirm the metallic character of the interface by calculating the in-plane conductance. The possibility of increasing the electron gas density by selective doping is also discussed.