Multiwall carbon nanotubes as quantum dots

We have measured the differential conductance of individual multiwall carbon nanotubes. Coulomb blockade and energy level quantization are observed. The electron levels are nearly fourfold degenerate (including spin) and their evolution in magnetic field (Zeeman splitting) agrees with a g factor of...

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Bibliographic Details
Published in:Physical review letters 2002-04, Vol.88 (15), p.156801-156801, Article 156801
Main Authors: Buitelaar, M R, Bachtold, A, Nussbaumer, T, Iqbal, M, Schönenberger, C
Format: Article
Language:English
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Summary:We have measured the differential conductance of individual multiwall carbon nanotubes. Coulomb blockade and energy level quantization are observed. The electron levels are nearly fourfold degenerate (including spin) and their evolution in magnetic field (Zeeman splitting) agrees with a g factor of 2. In zero magnetic field the sequential filling of states evolves with spin S according to S = 0-->1/2-->0... A Kondo enhancement of the conductance is observed when the number of electrons on the tube is odd.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.88.156801