Phase diagram of the two-dimensional disordered Hubbard model in the Hartree-Fock approximation

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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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)-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
Publication:	Physical Review B: Condensed Matter
Publisher:	The American Physical Society
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
URI:	http://eprints.iisc.ac.in/id/eprint/35667

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