Theory of Nested d-p Model with Strong Repulsion
Theory of Nested d-p Model with Strong Repulsion
复制标题
强斥力嵌套d-p模型理论
DOI：
10.1143/ptp/91.3.453
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
M. Kimura
中科院分区：
文献类型：
--
作者：
Taro Matsunami;M. Kimura
研究了d位上具有强排斥的嵌套d-P模型。从孤立原子极限（transfer->0）中的正常顺磁态的绿色函数开始，进行关于残余相互作用的展开，并求解标度方程。掺杂空穴介导的d-电子之间的吸引力起主导作用。对于小掺杂，一维可能的顺序分别是电荷密度波和单重态超导性，对于大掺杂，一维可能的顺序分别是电荷密度波和自旋密度波。在准一维情况下，只有电荷密度波建立了三维有序，单重态超导的涨落在短范围内发展。
The nested d-P model with a strong repulsion on d-sites is studied. Starting with Green functions of a normal paramagnetic state in an isolated atomic limit (transfer->0), expansions with respect to residual interactions are performed and scaling equations are solved. The attraction between d-electrons mediated by doped holes plays a dominant role. The possible orders in one dimension are of charge-density wave and singlet superconductivity for small doping, and of charge and spin-density wave for large doping, respectively. In quasi-one-dimension only charge-density wave establishes three-dimensional order and the fluctuation of singlet superconductivity develops in short range.