Log Number: P48
Abstract Submitted to the    NANOTUBE'04 Conference:

Transition from a Luttinger liquid to a Fermi liquid in potassium intercalated single wall carbon nanotubes

H. Rauf1, T. Pichler1, M. Knupfer1, J. Fink1, B. Büchner1, H. Shiozawa2 and H. Kataura2

1Institut für Festkörper- und Werkstoffforschung, D-01069 Dresden, Germany
2 Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji, Tokyo, 192-0397 Japan

Contact e-mail: h.rauf@ifw-dresden.de

From an electronic point of view, individual single wall carbon nanotubes (SWCNT) can be regarded as nearly perfect one-dimensional systems. As such, the metallic part of a nanotube sample should exhibit deviations from classical three-dimensional Fermi liquid behavior in the density of states near the Fermi level. The density of states can be probed directly by means of photoemission spectroscopy and it was recently demonstrated that mats of SWCNT do not display Fermi liquid behavior but rather Luttinger liquid (LL) behavior which manifests itself as a power law renormalization of the density of states in the vicinity of the Fermi level [1]. We report on recent results of the n-type doping-induced change in the electronic structure of SWCNT in bundles investigated by high resolution photoemission spectroscopy. In detail, the LL behavior is shown to be stable at low doping levels while at higher doping levels (C/K < 125) a crossover to a Fermi liquid behavior is observed.

Work is supported by DFG PI440/1

[1] H. Ishii et al., Nature 426, 540 (2003)

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