Three-terminal scanning tunneling spectroscopy of suspended carbon nanotubes

Abstract

We have performed low-temperature scanning tunneling spectroscopy measurements on suspended single-wall carbon nanotubes with a gate electrode allowing three-terminal spectroscopy measurements. These measurements show well-defined Coulomb diamonds as well as side peaks from phonon-assisted tunneling. The side peaks have the same gate voltage dependence as the main Coulomb peaks, directly proving that they are excitations of these states.

arXiv comment6 pages, 5 figures

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• Bipolaronic blockade effect in quantum dots with negative charging energy
• Robust negative differential conductance and enhanced shot noise in transport through a molecular transistor with vibration assistance
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• Coulomb blockade for an oscillating tunnel junction