Ultra-short suspended single-wall carbon nanotube transistors

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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• Strong coupling between single-electron tunneling and nano-mechanical motion
• Carbon nanotubes as ultra-high quality factor mechanical resonators
• Franck-Condon blockade in suspended carbon nanotube quantum dots
• Tunneling in suspended carbon nanotubes assisted by longitudinal phonons
• Vibrational and electronic heating in nanoscale junctions
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Cited by in corpus (8)

• Few-hundred GHz Carbon Nanotube NEMS
• Charge-vibration interaction effects in normal-superconductor quantum dots
• Mechanical control of quantum transport in graphene
• Giant Electron-hole Charging Energy Asymmetry in Ultra-short Carbon Nanotubes
• Tailoring 10 nm Scale Suspended Graphene Junctions and Quantum Dots
• Interaction-driven giant orbital magnetic moments in carbon nanotubes
• Orbital hyperfine interaction and qubit dephasing in carbon nanotube quantum dots
• Quantum Transport Straintronics and Mechanical Aharonov-Bohm Effect in Quasi-metallic SWCNTs