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arXiv · 1112.3552

Ultra-short suspended single-wall carbon nanotube transistors

J. O. Island·V. Tayari·S. Yigen·A. C. McRae·A. R. Champagne
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Abstract

We describe a method to fabricate clean suspended single-wall carbon nanotube (SWCNT) transistors hosting a single quantum dot ranging in length from a few 10s of nm down to $\approx$ 3 nm. We first align narrow gold bow-tie junctions on top of individual SWCNTs and suspend the devices. We then use a feedback-controlled electromigration to break the gold junctions and expose nm-sized sections of SWCNTs. We measure electron transport in these devices at low temperature and show that they form clean and tunable single-electron transistors. These ultra-short suspended transistors offer the prospect of studying THz oscillators with strong electron-vibron coupling.

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J. O. Island, V. Tayari, S. Yigen, A. C. McRae, A. R. Champagne. 2011-12-15. Ultra-short suspended single-wall carbon nanotube transistors. https://doi.org/10.1063/1.3670055

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