Microscopic modelling of doped manganites

TL;DR

This paper develops a microscopic model for doped manganites to understand their complex magnetic and electronic behaviors, balancing simplicity with detailed physical interactions.

Contribution

It introduces a detailed microscopic model incorporating charge, spin, orbital, and lattice interactions, supported by numerical simulations.

Findings

Successful modeling of low-energy physics of manganites

Insights into electron-lattice and spin-orbital correlations

Framework for future theoretical and experimental studies

Abstract

Colossal magneto-resistance manganites are characterised by a complex interplay of charge, spin, orbital and lattice degrees of freedom. Formulating microscopic models for these compounds aims at meeting to conflicting objectives: sufficient simplification without excessive restrictions on the phase space. We give a detailed introduction to the electronic structure of manganites and derive a microscopic model for their low energy physics. Focussing on short range electron-lattice and spin-orbital correlations we supplement the modelling with numerical simulations.