Ferromagnetism in the Hubbard Model on the Infinite Dimensional fcc Lattice
Martin Ulmke
TL;DR
This paper investigates ferromagnetism in the Hubbard model on an infinite-dimensional fcc lattice, revealing a phase transition to a polarized ferromagnetic state at strong interactions, with stability over hole doping and potential non-Fermi liquid behavior.
Contribution
It provides the first quantum Monte Carlo analysis of ferromagnetism in the Hubbard model on the fcc lattice in infinite dimensions.
Findings
Second order phase transition to ferromagnetism at strong coupling
Ferromagnetism stable over a wide hole doping range
Possible non-Fermi liquid behavior discussed
Abstract
The Hubbard model on the fcc lattice is studied in the limit of infinite spatial dimensions. At sufficiently strong interaction finite temperature Quantum Monte Carlo calculations yield a second order phase transition to a highly polarized ferromagnetic state. Ferromagnetism is stable over a wide hole doping regime but not for electron doping. A possible non-Fermi liquid behavior is discussed.
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Taxonomy
TopicsPhysics of Superconductivity and Magnetism · Theoretical and Computational Physics · Magnetism in coordination complexes