NUMERICAL STUDY OF THE SPECTRAL WEIGHT FUNCTION FOR THE HALF-FILLED 2-DIMENSIONAL HUBBARD-MODEL

被引：14

作者：

FENG, GS

WHITE, SR

机构：

[1] Department of Physics, University of California at Irvine, Irvine

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.46.8691

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spectral weight function A (p, omega) and density of states D (omega) at half filling are calculated with an exact diagonalization technique on the 4 X 4 square lattice in the one-band Hubbard model from weak to strong coupling. Quasiparticle peaks are observed at weak and moderate couplings, while mostly incoherent structure appears at strong coupling. The gap in the density of states can be observed for all couplings and widens as the interaction strength increases.

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页码：8691 / 8693

页数：3

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