Electronic structure of kinked multiwalled carbon nanotubes

Abstract

Changes in the local density of states (LDOS) of kinked multiwalled carbon nanotubes have been studied using scanning tunneling microscopy and spectroscopy (STM)/(STS). The measured STS spectra in the inelastically kinked region show that the LDOS is asymmetric about the Fermi level, while the spectra from regions away from the kink exhibit the usual symmetric LDOS that corresponds to perfect tubes. In the kinked region, the distribution of the unoccupied states is suppressed; this suppression of the conduction band states becomes unnoticeable ∼1.66 nm from the kink center.