1. Coulomb blockade ratchet pumping induced by surface acoustic waves in carbon nanotubes
- Author
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Jong-Gi Kim, Kang-Hun Ahn, Soo-Hyeon Park, Jinhee Kim, Byung-Chill Woo, Myung-Hwa Jung, Nam Kim, Woon Song, Kimin Hong, and Yun-Sok Shin
- Subjects
Physics ,Condensed matter physics ,Surface acoustic wave ,Ratchet ,Coulomb blockade ,Substrate (electronics) ,Carbon nanotube ,Acoustic wave ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Condensed Matter Physics ,Electron transport chain ,Electronic, Optical and Magnetic Materials ,law.invention ,law ,Quasiperiodic function - Abstract
We have observed net electron transport at zero bias, induced by surface acoustic wave (SAW), through a double-walled carbon nanotube on top of a GaAs substrate. As gate voltage varied, the SAW-induced current showed quasiperiodic oscillations ranging from positive to negative values. Such zero-bias oscillations were found to be closely related with the Coulomb oscillation at finite bias. SAW-induced ratchet pumping could explain our observations.
- Published
- 2006
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