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Carbon nanotube quantum dots fabricated on a GaAs/AlGaAs two-dimensional electron gas substrate

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7 Author(s)
Tsukamoto, T. ; Advanced Device Laboratory, RIKEN, The Institute of Physical and Chemical Research, 2-1, Hirosawa, Wako, Saitama 351-0198, Japan ; Moriyama, S. ; Tsuya, D. ; Suzuki, M.
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Single-wall carbon nanotube (SWCNT) quantum dots have been fabricated on a GaAs/AlGaAs two-dimensional electron gas (2DEG) substrate, and the single electron transport measurements have been carried out at 2.8 K and 22 mK with the 2DEG used as a gate. It was demonstrated that the gating by the 2DEG could be switched on and off by controlling a quantum point contact fabricated between the dot and the Ohmic contact to the 2DEG gate. The unique combination of the SWCNT dot and the 2DEG may open a door to realize flexible hybrid devices.

Published in:

Journal of Applied Physics  (Volume:98 ,  Issue: 7 )