| Pu_4~+在D_(4h)结构下的红外-拉曼活性及电声耦合的群论分析 |
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| 引用本文： | 方海,冯胜奇.Pu_4~+在D_(4h)结构下的红外-拉曼活性及电声耦合的群论分析[J].河南师范大学学报(自然科学版),2013,41(2):43-47. |
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| 作者姓名： | 方海 冯胜奇 |
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| 作者单位： | 韩山师范学院物理与电子工程系,广东潮州,521041 |
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| 基金项目： | 潮州市科研项目，广东省知识产权局科研项目，韩山师范学院科研项目 |
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| 摘 要： | 利用群论方法分析了Pu4+在D4h结构下振动模式,以及红外-拉曼活性,并且讨论了在以f轨道为基函数下可能存在的电声耦合及其杨-泰勒效应.结果表明,可能发生的杨-泰勒效应系统是Eub1g系统,或者Eub2g系统,或者Eu(b1g+b2g)系统.Eub1g畸变导致Pu4+分子从D4h的正方形结构降低到D2h对称性的菱形D2h结构,Eub2g畸变导致体系变化到矩形的D2h结构.这两种变化导致电子态从Eu分裂为B2u+B3u2个电子态.Eu(b1g+b2g)畸变导致体系变化到菱形的C2h结构,而电子态则分裂为2个Bu电子态.
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| 关 键 词： | 振动模式 红外 拉曼 电声耦合 杨-泰勒效应 对称性 |
The Group Analysis of Pu4+'s Infrared-Ramam Activity and the Election-Phonon Coupling under D4h Structure |
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| FANG Hai
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FENG Shengqi.The Group Analysis of Pu4+'s Infrared-Ramam Activity and the Election-Phonon Coupling under D4h Structure[J].Journal of Henan Normal University(Natural Science),2013,41(2):43-47. |
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| Authors: | FANG Hai FENG Shengqi |
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| Institution: | (Department of Physics and Electronic Engineering,Hanshan Normal University,Chaozhou 521041,China) |
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| Abstract: | The Pu4+'s vibration mode and the infrared-Ramam activity have been studied with group analysis under the D4h configuration.The election-phonon coupling and some possible Jahn-Teller effect under the f basis function also have been researched.It is found that the possible Jahn-Teller systems are Eub1g,or Eub2g,or Eu(b1g+b2g).The Eub1g will distort the square geometry of Pu4+(D4h) towards a rhomboid geometry of D2h;the Eub2g will distort the square gometry of Pu+4(D4h) towards a rectangle geometry of D2h;the above two Jahn-Teller distortions can lead the electronic state Eu to B2u+B3u.The Eu(b1g+b2g) will distort the square gometry of Pu+4(D4h) towards a rhomboid geometry of C2h,and let the electronic state from Eu to 2Bu. |
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| Keywords: | vibration mode infrared Raman election-phonon coupling Jahn-Teller effect symmetry |
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