Phase Separation in Hubbard Model

• Authors: J.H. Samson
• Languages of publication: EN

Abstracts

EN

The Hartree-Fock ground-state phase diagram of the one-dimensional Hubbard model is calculated in the μ-U plane, restricted to phases with no charge density modulation. This allows antiferromagnetism, saturated ferromagnetism, spiral spin density waves and a collinear structure with unit cell ↑↑↓↓. The spiral phase is unstable against phase separation near quarter-, half- and three-quarter-filling. For large U this occurs at hole (or electron) doping of (3t/π^{2}U)^{1/3} from half-filling.

Keywords

EN

75.25.+z; 75.10.Lp

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 2
• Pages: 363-366

Dates

published

1997-08

Contributors

author

J.H. Samson

• Department of Physics, Loughborough University, Loughborough, Leics LE11 3TU, United Kingdom