|
H. Rauf*, H. Shiozawa, T. Pichler, M. Knupfer, J. Fink, B. Büchner and H. Kataura
We report on results of the doping-induced changes in the electronic properties of single-walled carbon nanotubes (SWCNT) and C60-peapods using high resolution angle-integrated photoemission spectroscopy as a probe. It was recently demonstrated that bundles of SWCNT do not display Fermi liquid behavior but rather Tomonaga-Luttinger-liquid (TLL) behavior which manifests itself as a power law renormalization of the density of states in the vicinity of the Fermi level [1]. For SWCNT we show that this behavior is stable at low doping levels while at higher doping levels a crossover to a Fermi liquid behaviour is observed [2]. Recent results on the K-intercalation of C60-peapods show similar results regarding the power law scaling but have also distinct differences which allow to get further insight on hybridization strength and charge transfer between the C60 guests and the SWCNT hosts. Work is supported by DFG PI440/1 [1] H. Ishii et al., Nature 426, 540 (2003) [2] H. Rauf et al. PRL |