| 高TC超导体系Bi－Sb－Sr－Ca－Cu－O的红外吸收和［CuO5］金字塔结构 |
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| 引用本文： | 宋桂兰,朱正芳,白培光. 高TC超导体系Bi－Sb－Sr－Ca－Cu－O的红外吸收和［CuO5］金字塔结构[J]. 北京理工大学学报(英文版), 1996, 5(1): 63-67 |
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| 作者姓名： | 宋桂兰 朱正芳 白培光 |
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| 作者单位： | 北京理工大学光电工程系，内蒙古大学物理系 |
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| 摘 要： | 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．
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| 关 键 词： | 红外吸收；高温超导性；［CuO_5］金字塔结构 |
Infrared Absorption and [CuO5] Pyramid of High Tc Superconductor Bi-Sb-Sr-Ca-Cu-O System |
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| Song Guilan,Zhu Zhengfang and Bai Peiguang. Infrared Absorption and [CuO5] Pyramid of High Tc Superconductor Bi-Sb-Sr-Ca-Cu-O System[J]. Journal of Beijing Institute of Technology, 1996, 5(1): 63-67 |
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| Authors: | Song Guilan Zhu Zhengfang Bai Peiguang |
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| Affiliation: | Department of Optical Engneering, Beijing Institute of Technology, Beijing 100081;Department of Optical Engneering, Beijing Institute of Technology, Beijing 100081;Department of Physics, Neimongu University, Huhehaote 010021 |
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| Abstract: | 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 |
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| Keywords: | infrared absorption high temperature superconductivity [CuO_5] pyramid structure |
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