Carbon Nanotube Millikelvin Transport and Nanomechanics

TL;DR

This paper investigates the electronic transport and nano-mechanical properties of ultra-clean suspended single-wall carbon nanotubes at millikelvin temperatures, revealing their interactions over a wide range of coupling conditions.

Contribution

It presents measurements of transport spectra and nano-electromechanical interactions in pristine, cryogenically cooled carbon nanotubes grown in the final fabrication step.

Findings

Observation of transport spectrum in ultra-clean nanotubes

Interaction between electronic transport and nano-mechanics

Wide gate voltage range exploration

Abstract

Single wall carbon nanotubes cooled to cryogenic temperatures are outstanding electronic as well as nano-electromechanical model systems. To probe a largely unperturbed system, we measure a suspended carbon-nanotube device where the nanotube is grown in the last fabrication step, thus avoiding damage and residues from subsequent processing. In this ultra-clean device, we observe the transport spectrum and its interaction with nano-electromechanics over a wide gate voltage range and thereby over a wide range of coupling parameters between the quantum dot and the contact electrodes.