摘要
The infrared absorption spectra of different superconducting phase of high Tc super conductor Bi-Sb-Sr-Ca-Cu-O have been measured . The results show that only in the range of 400cm-1 -700cm-1,there is a group of peaks which changes with different superconducting phases.According to group theory and infrared spectra of CuO, this group of peaks could be assigned to be the [CuO6]octahedron, the [CuO5] pyramid and the [CuO4]plane quadrilateral,but not CU-O plane or CU-O chain. Furthermore, the quasi-three dimensional Cu-O layers consisting of [CuO5] pyramids and proper coupling between them are essential factor for high Tc. It seems that the weaker compling of layers, the higher Tc
测量了高Tc超导体系Bi－Sb－Sr－Ca－Cu－O的红外吸收光谱，其结果表明：只有在（400cm－1－700cm－1）的范围内，存在一组随超导相不同而变化的峰群，根据群论分析和CuO的红外吸收光谱，认定它们分别对应于［CuO6］八面体、［CuO5］金字塔和［CuO4］平面四边形结构，而不是CuO面或CuO链．进一步分析可得结论，由［CuO5］金字塔组成的准三维CuO面和它们之间的适当偶合才是获得高Tc的关键，而且似乎偶合越弱，Tc越高．
