Doping state of multi-wall carbon nanotubes wires and quantum dots

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dc.creatorSchönenberger, Christian
dc.creatorBuitelaar, Mark
dc.creatorKrüger, Michael
dc.creatorWidmer, Isabelle
dc.creatorNussbaumer, Thomas
dc.creatorIqbal, Mahdi
dc.date2001-06-25
dc.date2002-01-04
dc.date.accessioned2026-07-07T02:41:54Z
dc.date.available2026-07-07T02:41:54Z
dc.descriptionEmploying strong electrostatic gating (liquid-ion gating), the position of the Fermi energy E_F (relative to the charge-neutrality point) was determined in multi-wall carbon nanotubes (MWNTs). E_F is negative (hole doping) and amounts to \approx -0.3 eV for MWNTs in air. Evidence that water, and not oxygen, is the main source of doping has been found. As a consequence, the number M of occupied 1d-modes (not counting spin) is >2, i.e. M \approx 10. This is supported by the single-electron level spacing, deduced from observed single-electron charging effects (SET) at low temperature. The latter are dominated by co-tunneling processes, as we observe the Kondo effect. This provides evidence, that highly transmissive channels are present in MWNTs at low temperature, despite the `disorder' observed in previous experiments.
dc.descriptionProceedings Moriond 2001, 6 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0106501
dc.identifierhttp://arxiv.org/abs/cond-mat/0106501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17926
dc.subjectMesoscale and Nanoscale Physics
dc.titleDoping state of multi-wall carbon nanotubes wires and quantum dots
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