Tunneling spectroscopy of disordered multiwalled carbon nanotubes
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Physical Review B, Volume 71, Issue 12
AbstractThe tunneling density of states has been studied on disordered multiwalled carbon nanotubes. The tunneling conductance shows a large zero-bias anomaly, whose temperature and voltage dependence is successfully compared with the non-perturbative theory of electron tunneling into a disordered 1D electrode. The environmental Coulomb blockade is expected to set in at lower energies, where junctions can be considered to be zero-dimensional. In one of the samples, Coulomb blockade behavior is revealed over a wide range of temperatures. In this sample the tunneling is also studied using a superconducting counterelectrode, and the observed reduction of the conductivity is found to be in quantitative agreement with the theory.
carbon nanotubes, tunneling conductance, tunneling spectroscopy
Tarkiainen, R. & Ahlskog, M. & Paalanen, M. & Zyuzin, A. & Hakonen, Pertti J. 2005. Tunneling spectroscopy of disordered multiwalled carbon nanotubes. Physical Review B. Volume 71, Issue 12. 125425/1-5. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.71.125425