SU(2) theory of t-J two-leg ladders

被引：0

作者：

Ivanov, DA ^{[1
]}

Lee, PA ^{[1
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

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

基金：

美国国家科学基金会;

关键词：

mean-field theory; two-leg t-J ladders; bipolarons;

D O I：

10.1016/S0022-3697(98)00117-6

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present a low-energy effective model for the charge degrees of freedom in two-leg t-J ladders. Starting from the SU(2) mean-field theory, we find that, at low temperatures, the mean-field solution is the staggered-flux phase. Our analysis is applicable at low doping and in the 'physical' range of parameters, t/J similar to 3, where there is one massless mode in the charge sector and no massless modes in the spin sector. Low-lying charge excitations are described as bipolarons. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1825 / 1827

页数：3

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