Band-structure modulation in carbon nanotube T junctions

被引:36
作者
Chiu, PW [1 ]
Kaempgen, M [1 ]
Roth, S [1 ]
机构
[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
关键词
D O I
10.1103/PhysRevLett.92.246802
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We show that the band structure of metallic carbon nanotubes can be dramatically altered by the local electrostatic field. This is realized by coupling chemically functionalized nanotubes to form T junctions. The bar of the T is the conducting channel and the leg of the T is used for local gating. Transport measurements reveal that an energy gap develops upon application of a local electric field in both devices with or without linker molecules at the junction. We propose that the mechanism of the band gap modulation in the T junctions without linker molecules is the field effect, with the linker molecules introducing additional electromechanical and chemical effects.
引用
收藏
页码:246802 / 1
页数:4
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