INTERACTION AND DOPING DEPENDENCE OF OPTICAL SPECTRAL WEIGHT OF THE 2-DIMENSIONAL HUBBARD-MODEL

被引：67

作者：

MILLIS, AJ

COPPERSMITH, SN

机构：

[1] AT and T Bell Laboratories, Murray Hill

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.42.10807

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the total and low-frequency spectral weight of the optical conductivity of the two-dimensional Hubbard model for various values of the interaction strength and carrier concentration. In some limits we obtain exact results and bounds. For general parameter values we obtain estimates using the variational Monte Carlo technique. We show that our results disagree with those obtained by exact diagonalization of small systems, and argue that the latter are less accurate because of finite-size effects. © 1990 The American Physical Society.

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页码：10807 / 10810

页数：4

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