6533b85afe1ef96bd12b9703

RESEARCH PRODUCT

Charge pumping in carbon nanotube quantum dots

M. R. BuitelaarV. KashcheyevsP. J. LeekV. I. TalyanskiiC. G. SmithD. AndersonG. A. C. JonesJ. WeiD. H. Cobden

subject

Condensed Matter - Mesoscale and Nanoscale PhysicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)FOS: Physical sciencesCondensed Matter::Mesoscopic Systems and Quantum Hall Effect

description

We investigate charge pumping in carbon nanotube quantum dots driven by the electric field of a surface acoustic wave. We find that at small driving amplitudes, the pumped current reverses polarity as the conductance is tuned through a Coulomb blockade peak using a gate electrode. We study the behavior as a function of wave amplitude, frequency and direction and develop a model in which our results can be understood as resulting from adiabatic charge redistribution between the leads and quantum dots on the nanotube.

yearjournalcountryeditionlanguage
2008-04-20
10.1103/physrevlett.101.126803http://arxiv.org/abs/0804.3219