Electron-Doped Manganese Perovskites: The Polaronic State

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.

4 pages, 6 embedded figures

References in corpus (6)

• Phase Separation in Electronic Models for Manganites
• Polaron Absorption in a Perovskite Manganite La0.7Ca0.3MnO3
• Static and Dynamical Properties of the Ferromagnetic Kondo Model with Direct Antiferromagnetic Coupling Between the localized $t_{2g}$ Electrons
• On the Theory of Magnets with Competing Double Exchange and Superexchange Interactions
• Spin dynamics of hole doped Y2BaNiO5
• A Theory of Magnets with Competing Double Exchange and Superexchange Interactions

Cited by in corpus (11)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• The one dimensional Kondo lattice model at partial band filling
• Novel Magnetic Block States in Low-Dimensional Iron-Based Superconductors
• Ferromagnetic polarons in the one-dimensional ferromagnetic Kondo model with quantum mechanical S=3/2 core spins
• Revealing polarons with high pressure on low electron-doped manganites
• Magnetic Polarons in the 1D FM Kondo Model
• Spin and lattice effects in the Kondo lattice model
• Polaronic Aspects of the two-dimensional Ferromagnetic Kondo Model
• Magnetic polaron structures in the one-dimensional double and super-exchange model
• Quantum phase transition between one-channel and two-channel Kondo polarons
• Spin-polarons in an exchange model