Electronic structure of kinked multiwalled carbon nanotubes

Changes in the local density of states (LDOS) of kinked multiwalled carbon nanotubes have been studied using scanning tunneling microscopy and spectro scopy (STM)/(STS). The measured STS spectra in the inelastically kinked reg ion show that the LDOS is asymmetric about the Fermi level, while the spect ra from regions away from the kink exhibit the usual symmetric LDOS that co rresponds to perfect tubes. In the kinked region, the distribution of the u noccupied states is suppressed; this suppression of the conduction band sta tes becomes unnoticeable similar to 1.66 nm from the kink center. (C) 2000 American Institute of Physics. [S0003-6951(00)00724-5].