摘要
根据分子振动理论，采用简化模型分析了 Ｂｉ 系高温超导体 Ｃｕ Ｏ２ 面内 Ｃｕ Ｏ 键振动的振动模式，计算了单一红外活性模 Ｅｕ 的振动频率·计算结果表明： Ｃｕ Ｏ２ 面内 Ｃｕ Ｏ 键 Ｅｕ 模式伸缩振动的频率为６７３８ ｃｍ － １ ，８０３２ ｃｍ － １ ，弯曲振动的频率为４１２ ｃｍ － １·计算结果中６７３８ ｃｍ － １ ，４１２ ｃｍ － １ 与 Ｂｉ 系高温超导体红外吸收光谱的实验分析结果较好吻合，８０３２ ｃｍ － １ 与实验分析结果中８００ ｃｍ － １ 附近归属尚未确定的吸收峰峰位比较接近·
The vibration modes of Cu O bond in the CuO 2 plane of Bi system high temperature superconductor were analysed using the Molecule Vibration Theory and vibration frequency of infrared activity mode E u was calculated. The results show that the frequencies of Cu O bond stretching vibration in mode of E u are two grades of 673 8?cm -1 and 803 2?cm -1 respectively. The frequency of Cu O bending vibration in mode of E u is 412?cm -1 . The results of 673 8?cm -1 and 412?cm -1 are very close to the results of experimental analysis. The freqency 803 2?cm -1 is close to the position of an absorption peak at near 800?cm -1 in infrared absorption spectra of the Bi system high temperature superconductor and the absorption peak has not been explained before.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1999年第4期441-443,共3页
Journal of Northeastern University(Natural Science)
基金
国家"八六三"高科技项目
关键词
超导体
铜氧键振动
高TC
铋系
二氧化铜面
Bi system high temperature superconductor,Cu O bond vibration,secular equation.
