Three-terminal scanning tunneling spectroscopy of suspended carbon nanotubes

摘要

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