Simultaneous ferromagnetic metal-semiconductor transition in electron-doped EuO

TL;DR

This paper introduces a theoretical framework explaining how electron doping in EuO induces simultaneous magnetic and electronic phase transitions, aligning well with experimental observations.

Contribution

It provides a comprehensive model capturing the doping-dependent magnetic and electronic transitions in EuO, emphasizing the role of correlation-induced local moments.

Findings

Accurately describes conductivity and magnetization changes with doping

Reproduces the doping dependence of Curie temperature

Highlights the importance of local moments on impurity sites

Abstract

We present a general framework to describe the simultaneous para-to-ferromagnetic and semiconductor-to-metal transition in electron-doped EuO. The theory correctly describes detailed experimental features of the conductivity and of the magnetization, in particular the doping dependence of the Curie temperature. The existence of correlation-induced local moments on the impurity sites is essential for this description.