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Triple quantum dot charging rectifier
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DOI：10.1063/1.1807030.png)
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Three tunnel-coupled quantum dots in the Coulomb blockade regime act as a molecular rectifier. We have realized this device in a GaAs/Al(0.3)Ga(0.7)As heterostructure containing a two-dimensional electron gas using lithographically patterned gates. The current through two tunnel-coupled dots in series is recorded versus applied voltage. Ratchet behavior is created by a third dot, with one lead, tunnel-coupled to one of the two dots. An electron enters the third dot where it is trapped, producing a jamming effect where no other electron may enter the device. The current-voltage characteristics show rectification and negative resistance arising from charging of the third dot. (C) 2004 American Institute of Physics.
Keyword:
COULOMB-BLOCKADE
TRANSPORT
SYSTEM
期刊
IF:
3.6
论文数:
10.4W
被引数:
17.8W
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