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- W2101463303 abstract "Quantum dots defined in carbon nanotubes are a platform for both basic scientific studies1,2,3,4,5 and research into new device applications6. In particular, they have unique properties that make them attractive for studying the coherent properties of single-electron spins7,8,9,10,11. To perform such experiments it is necessary to confine a single electron in a quantum dot with highly tunable barriers1, but disorder has prevented tunable nanotube-based quantum-dot devices from reaching the single-electron regime2,3,4,5. Here, we use local gate voltages applied to an ultraclean suspended nanotube to confine a single electron in both a single quantum dot and, for the first time, in a tunable double quantum dot. This tunability is limited by a novel type of tunnelling that is analogous to the tunnelling in the Klein paradox of relativistic quantum mechanics. Single electrons and single holes have been confined inside a double quantum dot in a carbon nanotube for the first time. A previously unknown type of tunnelling that is analogous to that in the Klein paradox of relativistic quantum mechanics has also been observed." @default.
- W2101463303 created "2016-06-24" @default.
- W2101463303 creator A5042843637 @default.
- W2101463303 creator A5057575880 @default.
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- W2101463303 date "2009-04-06" @default.
- W2101463303 modified "2023-10-09" @default.
- W2101463303 title "Tunable few-electron double quantum dots and Klein tunnelling in ultraclean carbon nanotubes" @default.
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- W2101463303 doi "https://doi.org/10.1038/nnano.2009.71" @default.
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