Novel effects of localization due to `intrinsic disorder' in the `two-fluid' model for manganites

TL;DR

This paper investigates how intrinsic disorder affects the phase transition and electronic properties in manganites within a two-fluid model, revealing potential localization phenomena and changes in magnetic states.

Contribution

It introduces a novel polaronic disorder into the two-fluid model and analyzes its impact using effective field theory and numerical simulations.

Findings

Disorder induces a transition from ferromagnetic insulator to metal.

Presence of Anderson localized regime with variable range hopping.

Disorder significantly alters phase transition behavior.

Abstract

We discuss the effects of a novel polaronic disorder in the recently proposed two-fluid model for manganites. Using effective field theory as well as direct numerical simulations, we show that this disorder can have dramatic effects in terms of the transition from ferromagnetic insulator to ferromagnetic metal upon hole-doping, including an Anderson localized regime where variable range hopping may be observed.