| 非绝热量子晶格涨落效应作用下准一维电-声子系统的带间跃迁光吸收谱 |
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| 引用本文： | 王沁,郑杭.非绝热量子晶格涨落效应作用下准一维电-声子系统的带间跃迁光吸收谱[J].上海交通大学学报,1999,33(10):1193-1196. |
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| 作者姓名： | 王沁 郑杭 |
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| 作者单位： | 上海交通大学应用物理系，上海 200030 |
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| 摘 要： | 通过正则变换和位移变换引进电－声子散射函数，并采用ＨＦ平均场近似方法，研究非绝热条件下量子晶格涨落对准一维电－声子系统带间跃迁光吸收谱的影响，得到了与实验观测结果相符合的无反平方根奇异并具有能隙内带尾的光吸收系数。
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| 关 键 词： | 光吸收系数 非绝热 量子晶格涨落 电－声子系统 |
| 文章编号： | 1006-2467(1999)10-1193-04 |
| 修稿时间： | 1999年4月16日 |
Quantum Lattice Fluctuations on the Optical-Absorption Spectrum of a Model Electron-Phonon System |
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| WANG Qin,ZHENG Hang Dept. of Applied Physics,Shanghai Jiaotong Univ.,Shanghai ,China.Quantum Lattice Fluctuations on the Optical-Absorption Spectrum of a Model Electron-Phonon System[J].Journal of Shanghai Jiaotong University,1999,33(10):1193-1196. |
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| Authors: | WANG Qin ZHENG Hang Dept of Applied Physics Shanghai Jiaotong Univ Shanghai China |
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| Institution: | WANG Qin,ZHENG Hang Dept. of Applied Physics,Shanghai Jiaotong Univ.,Shanghai 200030,China |
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| Abstract: | Based on the unitary transformation methods and by introducing the scatter function,using the HF mean field approximation,the effect of quantum lattice fluctuation on the optical absorption spectrum of a model electron phonon system in nonadiabatic case was studied and the optical absorption coefficient consisting with the result of experiment investigations and having no inverse square root singularity at the gap edge was obtained. |
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| Keywords: | optical absorption coefficient non adiabatic case quantum lattice fluctuation |
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