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Failure of saturated ferromagnetism for the Hubbard model with two holes

✍ Scribed by Bálint Tóth


Publisher
Springer
Year
1991
Tongue
English
Weight
449 KB
Volume
22
Category
Article
ISSN
0377-9017

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Properties of doped holes in the antifer
✍ G. Vignale; M.R. Hedayati 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 128 KB

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 ex