We prove, as recently conjectured, that the ground state of the Hubbard Hamiltonian with an infinite-range hopping, when the number of electrons Ne = N + 1 (N being the number of sites), is ferromagnetic fully polarized. This turns out to be a simple consequence of a general theorem proven by Mielke on flat-band ferromagnetism.
Ferromagnetism in the Hubbard model with an infinite-range hopping
PIERI, Pierbiagio
1996-01-01
Abstract
We prove, as recently conjectured, that the ground state of the Hubbard Hamiltonian with an infinite-range hopping, when the number of electrons Ne = N + 1 (N being the number of sites), is ferromagnetic fully polarized. This turns out to be a simple consequence of a general theorem proven by Mielke on flat-band ferromagnetism.File in questo prodotto:
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