Obermeier, Thomas and Pruschke, Thomas and Keller, Joachim (1997) Ferromagnetism in the large-U Hubbard model. PHYSICAL REVIEW B, 56 (14). R8479-R8482. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We study the Hubbard model on a hypercubic lattice with regard to the possibility of itinerant ferromagnetism. Dynamical mean-field theory is used to map the lattice model on an effective local problem, which is treated with the help of the noncrossing approximation. By investigating spin-dependent one-particle Green's functions and the magnetic susceptibility, a region with nonvanishing ferromagnetic polarization is found in the limit U-->infinity. The delta-T phase diagram as well as thermodynamic quantities are discussed. The dependence of the Curie temperature on the Coulomb interaction and the competition between ferromagnetism and antiferromagnetism are studied in the large-Ci Limit of the Hubbard model.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MEAN-FIELD THEORY; T-J MODEL; CORRELATED ELECTRON-SYSTEMS; NORMAL-STATE PROPERTIES; INFINITE DIMENSIONS; NAGAOKA STATE; LATTICE; INSTABILITY; D=INFINITY; FERMIONS |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Joachim Keller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Mar 2023 09:15 |
| Last Modified: | 28 Mar 2023 09:15 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50541 |
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