Lead-molecule coupling effects on the distortion-dependent conductance of carbon nanotubes

被引：3
作者：
Bulat, Felipe A. [1 ]
Ke, San-Huang [1 ]
Yang, Weitao [1 ]
Couchman, Luise [1 ]
机构：
[1] Duke Univ, Dept Chem, Durham, NC 27708 USA
来源：
PHYSICAL REVIEW B | 2008年 / 77卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.77.153401
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of the lead-molecule coupling on the zero-bias conductance of carbon nanotubes as a function of tube distortion is studied. It is shown that the coupling strength can have a dramatic effect on the electromechanical characteristics. Robust conductance as a function of distortion is realized in the strong coupling regime, while sharp oscillations on the conductance for small geometrical changes can be observed in the weak coupling regime. The origin of the phenomenon is traced to the combined effect of the coupling-induced broadening and distortion-induced shifts of the energy levels.
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