ONE-ELECTRON SPECTRAL WEIGHT OF THE DOPED 2-DIMENSIONAL HUBBARD-MODEL

被引：97

作者：

BULUT, N

SCALAPINO, DJ

WHITE, SR

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106

[2] UNIV CALIF IRVINE,DEPT PHYS,IRVINE,CA 92717

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.72.705

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have calculated the single-particle density of states N(omega) and the spectral weight A(p,omega) for the doped two-dimensional Hubbard model by combining quantum Monte Carlo simulations with the maximum-entropy analytic continuation technique. We present results for various values of the doping, temperature, and Coulomb repulsion U. For sufficiently strong Coulomb repulsions and near half filling, a Mott-Hubbard pseudogap exists. In this case, we find that a peak develops at the top of the lower Hubbard band near the Fermi level at temperatures of order the hopping t. The structure of this peak is similar to that seen in the infinite-dimensional Hubbard model.

引用

页码：705 / 708

页数：4

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