PHASE-DIAGRAM OF THE 2-DIMENSIONAL DISORDERED HUBBARD-MODEL IN THE HARTREE-FOCK APPROXIMATION

被引：16

作者：

DASGUPTA, C ^{[1
]}

HALLEY, JW ^{[1
]}

机构：

[1] UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.47.1126

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

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页码：1126 / 1129

页数：4

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