✦ LIBER ✦

Magnetism in the single- and two-band Hubbard models: Generalized Hund's coupling

✍ Scribed by Koichi Kusakabe; Hideo Aoki

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 258 KB
Volume: 185-189
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(91)90879-4

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✦ Synopsis

Occurrence of high-spin ground states in strongly-correlated electron systems is explored. In the single-band Hubbard model, high-spin states arise even for small U due to a 'k-space Hund's coupling', which cross over to strong-U states including Nagaoka's state around the half filling. The magnetic phase diagram for the two.band Hubbard model with interband interactions is also revealed.

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