| 光激发下分子纳米结中电荷输运的振动效应研究 |
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| 引用本文： | 李金花,王鹿霞.光激发下分子纳米结中电荷输运的振动效应研究[J].物理学报,2011,60(11):117310-117310. |
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| 作者姓名： | 李金花 王鹿霞 |
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| 作者单位： | 北京科技大学数理学院物理系,北京 100083 |
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| 基金项目： | 中央高校基本科研业务费专项资金和国家自然科学基金(批准号:11174029)资助的课题. |
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| 摘 要： | 在纳米金属电极和分子组成的分子纳米结中,应用分子振动的简正坐标在弱耦合近似下研究了在光激发作用下电荷的输运过程,并从电离能的角度分析了顺序电荷转移的机理,研究了在光激发条件下分子纳米结的电流-电压特性. 发现分子的振动效应是Franck-Condon阻滞在光激发作用下消失的关键因素,进而在理论上分析了分子的电离能在电荷输运中的作用,同时分析了IVR效应对光激发下分子纳米结中电荷输运的影响.
关键词：
Franck-Condon阻滞
振动效应
电流-电压特性
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| 关 键 词： | Franck-Condon阻滞 振动效应 电流-电压特性 |
| 收稿时间： | 2011-01-28 |
| 修稿时间： | 3/4/2011 12:00:00 AM |
Vibrational effect on external field control of charge transmission in molecular nano-junction |
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| Li Jin-Hua and Wang Lu-Xia.Vibrational effect on external field control of charge transmission in molecular nano-junction[J].Acta Physica Sinica,2011,60(11):117310-117310. |
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| Authors: | Li Jin-Hua and Wang Lu-Xia |
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| Institution: | Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing,Beijing 100083, China;Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing,Beijing 100083, China |
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| Abstract: | With the weak-coupling approach in molecular vibrational normal coordinate, the charge transmission under external optical field through molecular nano-junction is studied. From the charging energy point of view, the sequential charge transmission is analyzed and the current-voltage characteristics under external optical field are studied. It is found that the vibrational effect of molecule is the key factor of the removal of Franck-Condon blockage under external optical field. Furthermore, the effects of charging energy and intra-molecular vibrational energy redistribution (IVR) in charge transmission under external optical field are studied in detail. |
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| Keywords: | Franck-Condon blockage vibrational effect current-voltage characteristics |
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