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Properties of doped holes in the antiferromagnetic state of the two-dimensional Hubbard model

✍ Scribed by G. Vignale; M.R. Hedayati

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 128 KB
Volume: 162-164
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(89)90793-4

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✦ Synopsis

We calculate the self-energy of a single hole in the half-filled antlferromaguetic two-dimensional Hubbard model. The minimum energy occurs at k = (7r/2, 7r/2) and is 37% lower than in Hartree-Fock. The hole lifetime tends to infinity for low-lying states, showing that quasiholes are well-defined excitations. The hole Fermi surface is predicted to change topology for doping concentrations larger than ,~ 159~.

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