Transport properties in Manganites

TL;DR

This paper models the transport properties of doped manganites using a simplified double exchange mechanism combined with disorder, employing dynamical mean-field theory to explain insulating behavior below charge order temperature.

Contribution

It introduces a combined Ising double exchange and Falicov-Kimball model to analyze charge order and transport in manganites, incorporating disorder and Hund coupling effects.

Findings

Insulator phase occurs below charge order temperature.

Model results align with experimental observations.

Transport properties are explained by the combined model.

Abstract

Transport properties in doped manganites are studied by considering the Simplified double exchange mechanism in the presence of diagonal disorder. It is modelled by a combination the Ising double exchange with Faliccov-Kimball model. In this model, charge order ferromagnetic and transport quantities are presented by using Dynamical mean-field theory in the case of finite Hund coupling and disorder strength. Those results suggest that, within this model the insulator phase can be stated in the range of below charge order temperature which is suitable with the observations in the experimental manganites.