Franck-Condon blockade and giant Fano factors in transport through single molecules

被引:446
作者
Koch, J [1 ]
von Oppen, F [1 ]
机构
[1] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany
关键词
D O I
10.1103/PhysRevLett.94.206804
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that Franck-Condon physics leads to a significant current suppression at low bias voltages (termed Franck-Condon blockade) in transport through single molecules with strong coupling between electronic and vibrational degrees of freedom. Transport in this regime is characterized by remarkably large Fano factors (10(2)-10(3) for realistic parameters), which arise due to avalanchelike transport of electrons. Avalanches occur in a self-similar manner over a wide range of time scales, leading to power-law dependences of the current noise on frequency and vibrational relaxation rate.
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页数:4
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