PMID: 15245119Jul 13, 2004Paper

Band-structure modulation in carbon nanotube T junctions

Physical Review Letters
Po-Wen ChiuSiegmar Roth

Abstract

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.

References

Jun 15, 1992·Physical Review. B, Condensed Matter·I M RuzinL I Glazman
Sep 16, 2000·Physical Review Letters·L Yang, J Han
Jul 30, 2002·Physical Review Letters·Yu N GartsteinR H Baughman
Dec 18, 2002·Physical Review Letters·P KeblinskiP M Ajayan
May 7, 2003·Physical Review Letters·E D MinotPaul L McEuen
Oct 4, 2003·Physical Review Letters·Wanlin Guo, Yufeng Guo
Dec 20, 2003·Physical Review Letters·Keith BradleyGeorge Grüner

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