HOLE POCKETS IN THE DOPED 2D HUBBARD-MODEL

被引：0

作者：

DUFFY, D ^{[1
]}

MOREO, A ^{[1
]}

机构：

[1] FLORIDA STATE UNIV,SUPERCOMP COMPUTAT RES INST,TALLAHASSEE,FL 32306

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1995年 / 8卷 / 05期

关键词：

SUPERCONDUCTIVITY; HUBBARD MODEL; ELECTRONIC DENSITY; HOLE POCKETS;

D O I：

10.1007/BF00727444

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electronic momentum distribution n(k) of the two dimensional Hubbard model is studied for different values of the coupling U/t, electronic density [n], and temperature, using quantum Monte Carlo techniques. A detailed analysis of the data on 8 x 8 clusters shows that features consistent with hole pockets at momenta k = (+/-pi/2,+/-pi/2) appear as the system is doped away from half-filling. Our results are consistent with recent experimental data for the cuprates discussed by Aebi et al. (Phys. Rev. Lett. 72, 2757 (1994)). In the range of couplings studied, the depth of the pockets is maximum at [n] approximately 0.9, and it increases with decreasing temperature. The apparent absence of hole pockets in previous numerical studies of this model is explained.

引用

页码：617 / 618

页数：2

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