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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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Official URL: http://prb.aps.org/abstract/PRB/v47/i2/p1126_1

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
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.ernet.in/id/eprint/35667

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