| 金属/C2H2/金属结构中的电子输运 |
| |
| 引用本文： | 周晓艳,童国平.金属/C2H2/金属结构中的电子输运[J].原子与分子物理学报,2005,22(4):590-596. |
| |
| 作者姓名： | 周晓艳 童国平 |
| |
| 作者单位： | 浙江师范大学物理系,金华,321004 |
| |
| 基金项目： | :Keysubjectfosteredbyzhejiangprovinglce |
| |
| 摘 要： | 在紧束缚近似下,利用转移矩阵法对“金属/C2H2/金属”结构的分子导线的电子输运性质进行了研究。通过转移矩阵法求出转移矩阵和散射矩阵,从而解析地得到体系的透射系数和态密度的变化,并详细分析了透射系数对C2H2与金属的耦合强度及两个(CH)间的耦合强度的依赖关系。我们的结果显示这种结构的分子导线有着较好的开关特性。
|
| 关 键 词： | 透射系数 散射矩阵 转移矩阵法 分子导线 |
| 文章编号： | 1000-0364（2005）04-0590-07 |
| 收稿时间： | 11 17 2004 12:00AM |
| 修稿时间： | 2004-11-17 |
Transmission in metal/C2H2/metal structures |
| |
| ZHOU Xiao-yan,TONG Guo-ping.Transmission in metal/C2H2/metal structures[J].Journal of Atomic and Molecular Physics,2005,22(4):590-596. |
| |
| Authors: | ZHOU Xiao-yan TONG Guo-ping |
| |
| Institution: | Department of Physics, Zhejiang Normal University, Jinhua 321004, P. R. China |
| |
| Abstract: | The electronic transmission through the molecular wire,metal/C_2H_2/metal,is studied using a tight-binding model and the transfer-matrix technique.The electronic transmission coefficient and the change of electronic density of states in the wire are analytically calculated from the scattering matrix with the help of the transfer-matrix.The dependence on the electronic transmission of the energy parameter and the metal-molecule coupling,and molecule site-energy and atomatom coupling within the molecule are analyzed in detail.Our results show such molecular wire have switching character. |
| |
| Keywords: | Transmission coefficient Scattering matrix Transfer-matrix technique Molecular wire |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《原子与分子物理学报》浏览原始摘要信息 |
| 点击此处可从《原子与分子物理学报》下载免费的PDF全文 |
