Electron-Doped Manganese Perovskites: The Polaronic State
C.D. Batista(1), J.M. Eroles(1), M. Avignon(1,2), B. Alascio(1), ((1) Inst. Balseiro, Bariloche, Argentina - (2) LEPES-CNRS, Grenoble, France)
TL;DR
This paper investigates the ground state of electron-doped manganese perovskites, revealing inhomogeneous ferromagnetic polarons and their interactions using a computational approach.
Contribution
It introduces a detailed analysis of polaron states and their interactions in manganese perovskites with a focus on the effects of super-exchange and magnetic fields.
Findings
Ground state is inhomogeneous with ferromagnetic polarons
Polaron spin distortion extent varies with parameters
Polaron-polaron interactions are repulsive
Abstract
Using the Lanczos method in linear chains we study the ground state of the double exchange model including an antiferromagnetic super-exchange in the low concentration limit. We find that this ground state is always inhomogeneous, containig ferromagnetic polarons. The extention of the polaron spin distortion, the dispersion relation and their trapping by impurities, are studied for diferent values of the super exchange interaction and magnetic field. We also find repulsive polaron polaron interaction.
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