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考虑分子的振动能级,在简正反应坐标下研究了通过"金属/分子/金属"所组成系统的非弹性电流.研究发现非弹性电流传输过程中分子不同带电态的能量的相对位形对Franck-Condon阻滞有较强的影响,进而在理论上分析了分子的稳定态与Franck-Condon阻滞的关系,以及分子内部的振动能量分布、分子与金属电极的相对位置与系统的电流-电压曲线的关系.
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关键词:
- Frank-Condon阻滞 /
- 非弹性电流 /
- 电流-电压关系
Considering the effect of molecular vibrational levels, inelastic currents through the "metal/single molecule/metal" in the frame of normal vibrational mode are studied. The results show that the Franck-Condon blockage is strongly dependent on the stable energy configuration of molecule in the charge transmission, thus the relation between stationary state and Franck-Condon blockage and the relations of intra molecular vibrational redistribution as well as the relative position of molecule and electrodes to the current-voltage character of the stationary molecule state are further studied theoretically.[1] Joachim C, Ratne M A 2005 Proc. Natl. Acad. Sci. U.S.A. 102 8800
[2] Ventra M Di, Pantelides S T, Lang N D 2002 Phys. Rev. Lett. 88 046801
[3] Seideman T 2003 J. Phys. D:Condens. Matter 15 R521
[4] Park H, Park J, Lim A K L, Anderson E H, Alivisators A P, McEuen P L 2000 Nature 407 57
[5] Park J , Pasupathy A N, Goldsmith J I, Soldatov A V, Chang C, Yaish Y, Sethna J P, Abrun H D, Ralph D C, McEuen P L 2003 Thin Solid Film 438 457
[6] Qiu X H, Nazin G V, Ho W 2004 Phys. Rev. Lett. 92 20612
[7] Galperin M, Ratner M A, Nitzan A 2005 J. Chem. Phys. 121 11965
[8] Galperin M, Nitzan A 2005 Phys. Rev. Lett. 95 206802
[9] Galperin M, Nitzan A 2006 J. Chem. Phys. 124 234709
[10] Zheng X L, Zheng J M, Ren Z Y, Guo P, Tian J T, Bai J T 2009 Acta Phys. Sin. 58 5709 (in Chinese)[郑新亮、郑继明、任兆玉、郭 平、田进寿、白晋涛 2009 58 5709]
[11] Xia C J, Fang C F, Hu G C, Li D M, Liu D S, Xie S J 2007 Acta Phys. Sin. 56 4884 (in Chinese)[夏蔡娟、房常峰、胡贵超、李东梅、刘德胜、谢士杰 2007 56 4884]
[12] Li Y D, Li H H, Wang C G 2002 Acta Phys. Sin. 51 2349 (in Chinese)[李英德、李红海、王传奎 2002 51 2349]
[13] May V, Kühn O 2006 Chem. Rev. Lett. 420 192
[14] May V, Kühn O 2008 Phys. Rev. B 77 115439
[15] May V, Kühn O 2008 Phys. Rev. B 77 115440
[16] Koch J, Oppen F von 2005 Phys. Rev. Lett. 94 206804
[17] Koch J, Oppen F von, Nitzan A 2006 Phys. Rev. B 73 155306
[18] Welack S, Madddox J B, Esposito M, Harbola U, Mukamel S 2008 Nano Lett. 8 1137
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[1] Joachim C, Ratne M A 2005 Proc. Natl. Acad. Sci. U.S.A. 102 8800
[2] Ventra M Di, Pantelides S T, Lang N D 2002 Phys. Rev. Lett. 88 046801
[3] Seideman T 2003 J. Phys. D:Condens. Matter 15 R521
[4] Park H, Park J, Lim A K L, Anderson E H, Alivisators A P, McEuen P L 2000 Nature 407 57
[5] Park J , Pasupathy A N, Goldsmith J I, Soldatov A V, Chang C, Yaish Y, Sethna J P, Abrun H D, Ralph D C, McEuen P L 2003 Thin Solid Film 438 457
[6] Qiu X H, Nazin G V, Ho W 2004 Phys. Rev. Lett. 92 20612
[7] Galperin M, Ratner M A, Nitzan A 2005 J. Chem. Phys. 121 11965
[8] Galperin M, Nitzan A 2005 Phys. Rev. Lett. 95 206802
[9] Galperin M, Nitzan A 2006 J. Chem. Phys. 124 234709
[10] Zheng X L, Zheng J M, Ren Z Y, Guo P, Tian J T, Bai J T 2009 Acta Phys. Sin. 58 5709 (in Chinese)[郑新亮、郑继明、任兆玉、郭 平、田进寿、白晋涛 2009 58 5709]
[11] Xia C J, Fang C F, Hu G C, Li D M, Liu D S, Xie S J 2007 Acta Phys. Sin. 56 4884 (in Chinese)[夏蔡娟、房常峰、胡贵超、李东梅、刘德胜、谢士杰 2007 56 4884]
[12] Li Y D, Li H H, Wang C G 2002 Acta Phys. Sin. 51 2349 (in Chinese)[李英德、李红海、王传奎 2002 51 2349]
[13] May V, Kühn O 2006 Chem. Rev. Lett. 420 192
[14] May V, Kühn O 2008 Phys. Rev. B 77 115439
[15] May V, Kühn O 2008 Phys. Rev. B 77 115440
[16] Koch J, Oppen F von 2005 Phys. Rev. Lett. 94 206804
[17] Koch J, Oppen F von, Nitzan A 2006 Phys. Rev. B 73 155306
[18] Welack S, Madddox J B, Esposito M, Harbola U, Mukamel S 2008 Nano Lett. 8 1137
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