1. Metal-Insulator Transition in the Hubbard Model: Correlations and Spiral Magnetic Structures.
- Author
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Timirgazin, Marat, Igoshev, Petr, Arzhnikov, Anatoly, and Irkhin, Valentin
- Subjects
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METAL-insulator transitions , *HUBBARD model , *LINEAR free energy relationship , *MAGNETIC structure , *CRYSTAL lattices , *HARTREE-Fock approximation - Abstract
The metal-insulator transition (MIT) for the square, simple cubic, and body-centered cubic lattices is investigated within the t- $$t^\prime $$ Hubbard model at half-filling by using both the generalized for the case of spiral order Hartree-Fock approximation (HFA) and Kotliar-Ruckenstein slave-boson approach. It turns out that the magnetic scenario of MIT becomes superior over the non-magnetic one. The electron correlations lead to some suppression of the spiral phases in comparison with HFA. We found the presence of a metallic antiferromagnetic (spiral) phase in the case of three-dimensional lattices. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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