Superconductivity of the one-dimensional d-p model with p-p transfer
Superconductivity of the one-dimensional d-p model with p-p transfer
复制标题
具有 p-p 传递的一维 d-p 模型的超导性
DOI：
10.1143/jpsj.67.389
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发表时间：
1997
影响因子：
1.7
通讯作者：
Y. Ono
中科院分区：
文献类型：
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作者：
K. Sano;Y. Ono
用数值对角化方法研究了近邻p位之间转移能为tp p的一维d-p模型。通过计算基于Luttinger液体关系和配对关联函数的临界指数Kρ，我们分析了由Cu位的大斥力Ud和转移能tpp协同作用而引起的超导态。得到了填充n-Ud参数平面上超导区域的相图。结果表明，当Ud大于某一临界值时，出现超导区，该临界值随n的增大而减小。配对关联函数的结果表明，最近邻p位之间的单重态配对与超导电性最相关。通过分析Kρ对参数的依赖关系，讨论了d-p模型与t-J模型之间的关系。
We investigate the one-dimensional d - p model with the transfer energy t p p between the nearest neighbor p sites by the numerical diagonalization method. By calculating the critical exponent K ρ based on the Luttinger liquid relations and the paring correlation functions, we analyze the superconducting state induced by the effect of the large repulsion U d at the Cu site in cooperation with the transfer energy t p p . We obtain a phase diagram of the superconducting region on the filling n vs. U d parameter plane. It shows that the superconducting region appears when U d is larger than a certain critical value which decreases with increasing n . The results of paring correlation functions suggest that a singlet paring between the nearest neighbor p sites is most relevant to the superconductivity. We also discuss a relationship between the d - p model and the t - J model through an analysis of the dependence of K ρ on the parameters.
Kazuhiro Sano：“基于 Luttinger 液体理论的一维 Hubbard、t-J 和 d-p 模型之间的明确关系”Physica C.（待提交）。
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