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Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.96.174435
Abstract: We prove that Nagaoka's theorem, that the ground state of the large-U Hubbard model with exactly one hole is ferromagnetic, holds for any balanced Hamiltonian. We argue that, in itinerant electron systems, a balanced Hamiltonian,…
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Keywords:
electron systems;
balance frustration;
itinerant electron;
frustration strongly ... See more keywords