Superexchange interaction in the d-p model
Superexchange interaction in the d-p model
复制标题
d-p 模型中的超交换相互作用
DOI：
10.1143/jpsj.67.3536
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Y. Kuroda
中科院分区：
文献类型：
--
作者：
S. Fukagawa;A. Kobayashi;K. Miura;T. Matsuura;Y. Kuroda
利用从属玻色子技术，结合Feynman图解展开式和大自旋轨道简并度N(1/N展开式)展开，得到了模拟高温超导材料CuO2面上二维电子系统的d-p模型金属相超交换作用的解析形式。结果恢复了绝缘相中的已知形式，并与实验结果进行了比较，表明金属相中的掺杂载流子密度具有很强的依赖性。
An analytic form of superexchange interaction in the metallic phase of the d - p model simulating 2D electronic systems on CuO 2 planes of high- T c superconducting materials is obtained by using the slave-boson technique together with Feynman's diagrammatical expansion and the expansion from the limit of the large spin-orbital degeneracy N (1/ N -expansion). The result recovers the well-known form obtained in the insulating phase and shows strong dependence on density of doped-carriers in metallic phases, which is compared with experiments.