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
收藏
页码：1825 / 1827
页数：3
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