  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.
