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Analytically tractable mean-field theory for interacting electrons at strong coupling

✍ Scribed by V. Janisˇ; D. Vollhardt

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 164 KB
Volume: 194-196
Category: Article
ISSN: 0921-4526
DOI: 10.1016/0921-4526(94)90574-6

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✦ Synopsis

A mean-field theory for the Hubbard model at strong-coupling is presented. It extends the well-known, but ad hoc, alloy-analogy approximation and puts it on a firm, thermodynamically consistent basis. The magnetic ordering is studied and the mean-field phase diagram in the U -n plane is determined for T = 0. The investigation of the spectral properties away from half filling reveals a sequence of magnetic and metal-insulator transitions for increasing U.

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