Hubbard-model: Instabilities of the paramagnetic phase towards ferromagnetic and antiferromagnetic ordering
β Scribed by Krisement, O.
- Publisher
- Springer-Verlag
- Year
- 1974
- Weight
- 436 KB
- Volume
- 270
- Category
- Article
- ISSN
- 0044-3328
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## Abstract Intrasite dβd electron interactions are included in the Hubbard model, replacing the simplified sβelectron picture of Penn [5]. The technique is identical with an earlier paper by Siegel and Kemeny [1] on the ferromagneticβparamagnetic transition. Choosing __k__βspace correlation functi
The interplay between antiferromagnetism (AF) and superconductivity (SC) in cuprates is studied for the two-dimensional Hubbard model with a diagonal transfer t 0 , using a variational Monte Carlo method. Optimizing an improved function for strongly correlated values of U/t, we construct phase diagr