Aspects of the FM Kondo Model: From Unbiased MC Simulations to Back-of-an-Envelope Explanations

2005/11/30 by M. Daghofer, Maria Daghofer, W. Koller +7
Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #Curie temperature #Ferromagnetism #Jump #Kondo effect #Lattice (music) #Phase (matter) #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.str-el

paper · pdf · doi:10.1007/11417255_3

published in Lecture notes in physics, 31-45 (Springer Science+Business Media) · Proceedings of Wandlitz Days of Magnetism 2004

openalex publication_date 2005/11/30 · arxiv created 2005/12/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Effective models are derived from the ferromagnetic Kondo lattice model with classical corespins, which greatly reduce the numerical effort. Results for these models are presented. They indicate that double exchange gives the correct order of magnitude and the correct doping dependence of the Curie temperature. Furthermore, we find that the jump in the particle density previously interpreted as phase separation is rather explained by ferromagnetic polarons.

Citations

• Uniform hopping approach to the ferromagnetic Kondo model at finite temperature
• Temperature-dependent pseudogaps in colossal magnetoresistive oxides
• Polaronic aspects of the two-dimensional ferromagnetic Kondo model
• Single-particle spectrum of the flux phase in the FM Kondo model
• Effective spinless fermions in the strong-coupling Kondo model
• Fermi Surface Nesting and Nanoscale Fluctuating Charge/Orbital Ordering in Colossal Magnetoresistive Oxides
• MEAN-FIELD APPROACH TO CHARGE, ORBITAL, AND SPIN ORDERING IN MANGANITES