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Ferromagnetism in Hubbard Models Explained by Supriya is a document available to read on EtoBox.
The document discusses a Hubbard model that exhibits ferromagnetism under certain conditions. Specifically, it summarizes that Tasaki found the ground state has maximum total spin if the ratio of U to the bandwidth is large enough and the ratio of the second neighbor hopping to the bandwidth is also large enough. This shows there is a Hubbard model with non-singular parameters that is capable of becoming ferromagnetic in a finite region of parameter space. However, the exact proof technique does not provide
- Author
- Supriya
- Language
- EN