1993•Physical review. B, Condensed matterRequires access

Specific details of the mean-field slave-boson solution of the Hubbard model

René Meyer, P. Entel

Abstract

The single-band Hubbard model has been studied on a simple square lattice using the slave-boson representation. The magnetic phase diagram was derived numerically from solutions of the saddle-point equations. With increase in the on-site Coulomb repulsion U we find a phase transition to a ferromagnetic state that is fully spin polarized even for finite U.

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Key concepts: Slave boson, Hubbard model, Physics, Square lattice, Mean field theory, Saddle, Condensed matter physics, Phase diagram