Theoretical study of Cu-O chain fragments in the oxygen-deficient planes of YBa2CU3O6+x .2. Intrachain interactions and the chain fragment's length distribution

被引:19
|
作者
Gawiec, P [1 ]
Grempel, DR [1 ]
Uimin, G [1 ]
Zittartz, J [1 ]
机构
[1] UNIV COLOGNE,INST THEORET PHYS,D-50937 COLOGNE,GERMANY
来源
PHYSICAL REVIEW B | 1996年 / 53卷 / 09期
关键词
D O I
10.1103/PhysRevB.53.5880
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We study some models of the strongly correlated Cu-O chain fragments that form on the oxygen-deficient planes of YBa2Cu3O6+x. We use analytical and numerical methods to investigate the stability of the chain fragments as a function of their size. We discuss also the size and x dependence of the O-O intrachain interactions that enter in the phenomenological descriptions of the CuOx planes. Only the fermionic degrees of freedom of the chain fragments are considered.
引用
收藏
页码:5880 / 5888
页数:9
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