Adiabatic charge pumping in carbon nanotube quantum dots |
| |
Authors: | Buitelaar M R Kashcheyevs V Leek P J Talyanskii V I Smith C G Anderson D Jones G A C Wei J Cobden D H |
| |
Institution: | Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom. |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|