Dasgupta, C and Halley, JW (1993) Phase diagram of the two-dimensional disordered Hubbard model in the Hartree-Fock approximation. In: Physical Review B: Condensed Matter, 47 (2). 1126-1129 .
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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)-delta(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.
|Item Type:||Editorials/Short Communications|
|Additional Information:||Copyright of this article belongs to The American Physical Society.|
|Department/Centre:||Division of Physical & Mathematical Sciences > Physics|
|Date Deposited:||18 Feb 2011 07:02|
|Last Modified:||18 Feb 2011 07:02|
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