Transport through a double barrier in Large Radius Carbon Nanotubes with a transverse magnetic field

S. Bellucci () and P. Onorato

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 52, issue 4, 469-476

Abstract: We discuss the Luttinger Liquid behaviour of Large Radius Carbon Nanotube e.g. the Multi Wall ones (MWNT), under the action of a transverse magnetic field B. Our results imply a reduction with B in the value of the bulk critical exponent, α bulk , for the tunneling density of states, which is in agreement with that observed in transport experiments. Then, the problem of transport through a Quantum Dot formed by two intramolecular tunneling barriers along the MWNT, weakly coupled to Tomonaga-Luttinger liquids is studied, including the action of a strong transverse magnetic field B. We predict the presence of some peaks in the conductance G versus B, related to the magnetic flux quantization in the ballistic regime, at a very low temperature T, and also at higher values of T, where the Luttinger behaviour dominates. The temperature dependence of the maximum G max of the conductance peak according to the Sequential Tunneling follows a power law, G ∝T γe-1 with γ e linearly dependent on the critical exponent, α end , strongly reduced by B. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 05.60.Gg Quantum transport, 71.10.Pm Fermions in reduced dimensions, 73.63.-b Electronic transport in nanoscale materials and structures, 71.20.Tx Fullerenes and related materials; intercalation compounds, (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2006-00326-3

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