From Nagaoka's Ferromagnetism to Flat-Band Ferromagnetism and Beyond: An Introduction to Ferromagnetism in the Hubbard Model
نویسندگان
چکیده
منابع مشابه
Ferromagnetism in Hubbard models.
We present the first rigorous examples of non-singular Hubbard models which exhibit ferromagnetism at zero temperature. The models are defined in arbitrary dimensions, and are characterized by finite-ranged hoppings, dispersive bands, and finite on-site Coulomb interaction U . The picture, which goes back to Heisenberg, that sufficiently large Coulomb interaction can revert Pauli paramagnetism ...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1998
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.99.489