期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.126803
关键词
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资金
- UK QIP IRC [GR/S82176/01]
- Latvian Council of Science
- European Social Fund
- German-Israeli Project Cooperation ( DIP)
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.
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