Abstract
Ground-state properties of the two-dimensional Hubbard model with point-defect disorder are investigated numerically in the Hartree-Fock approximation. The phase diagram in the p(point defect concentration) (deviation from half filling) plane exhibits antiferromagnetic, spin-density-wave, paramagnetic, and spin-glass-like phases. The disorder stabilizes the antiferromagnetic phase relative to the spin-density-wave phase. The presence of U strongly enhances the localization in the antiferromagnetic phase. The spin-density-wave and spin-glass-like phases are weakly localized.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1126-1129 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 47 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 1 1993 |