Transport through a double barrier in Large Radius Carbon Nanotubes
with a transverse magnetic field |
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Authors: | S Bellucci P Onorato |
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Institution: | (1) INFN, Laboratori Nazionali di Frascati, P.O. Box 13, 00044 Frascati, Italy;(2) Department of Physics “A. Volta”, University of Pavia, via Bassi 6, 27100 Pavia, Italy |
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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, αbulk, 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 Gmax of the conductance peak according to the Sequential Tunneling follows a power law, G ∝Tγe-1 with
γe linearly dependent on the critical exponent,
αend, strongly reduced by B. |
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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 |
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