Abstract
It is believed that strong ferromagnetic orders in some solids are generated by subtle interplay between quantum many-body effects and spin-independent Coulomb interactions between electrons. Here we describe our rigorous and constructive approach to ferromagnetism in the Hubbard model, which is a standard idealized model for strongly interacting electrons in a solid.
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Tasaki, H. Hubbard model and the origin of ferromagnetism. Eur. Phys. J. B 64, 365–372 (2008). https://doi.org/10.1140/epjb/e2008-00113-2
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DOI: https://doi.org/10.1140/epjb/e2008-00113-2