A numerical and analytical study of two holes doped into the 2D t-J model

被引：3

作者：

Chernyshev, AL

Leung, PW

Gooding, RJ

机构：

[1] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[2] Hong Kong Univ Sci & Technol, Dept Phys, Clear Water Bay, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1998年 / 59卷 / 10-12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

t-J model; spin polaron; quasiparticle Hamiltonian; bound state; pairing mechanism;

D O I：

10.1016/S0022-3697(98)00112-7

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Exact diagonalization numerical results are presented for a 32-site square cluster, with two holes: propagating in an antiferromagnetic background described by the t-J model. We characterize the wave function of the lowest energy bound state found in this calculation, which has d(x2-y2) symmetry. Analytical work is presented, based on a Lang-Firsov-type canonical transformation derived quasiparticle Hamiltonian, that accurately agrees with numerically determined values for the electron momentum distribution function and the pair correlation function. We interpret this agreement as strong support for the validity of this description of the hole quasiparticles. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1815 / 1817

页数：3

共 15 条

[1] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].