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

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

2005-12-19

arxiv.org/abs/cond-mat/0512462v1

Lecture Notes in Physics, vol. 678, pp. 31 - 45, Springer 2005

Physics

Condensed Matter

Strongly Correlated Electrons

Proceedings of Wandlitz Days of Magnetism 2004

Scientific paper

10.1007/11417255_3

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.

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