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- W2015809785 abstract "Polytype nanodots are arguably the simplest nanodots than can be made, but their technological control was, up to now, challenging. We have developed a technique to produce nanowires containing exactly one polytype nanodot in GaAs with thickness control. These nanodots have been investigated by photoluminescence, which has been cross-correlated with transmission electron microscopy. We find that short (4–20 nm) zincblende GaAs segments/dots in wurtzite GaAs confine electrons and that the inverse system confines holes. By varying the thickness of the nanodots we find strong quantum confinement effects which allows us to extract the effective mass of the carriers. The holes at the top of the valence band have an effective mass of approximately 0.45 m0 in wurtzite GaAs. The thinnest wurtzite nanodot corresponds to a twin plane in zincblende GaAs and gives efficient photoluminescence. It binds an exciton with a binding energy of roughly 50 meV, including central cell corrections." @default.
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- W2015809785 date "2015-03-30" @default.
- W2015809785 modified "2023-09-30" @default.
- W2015809785 title "Confinement in Thickness-Controlled GaAs Polytype Nanodots" @default.
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- W2015809785 doi "https://doi.org/10.1021/acs.nanolett.5b00253" @default.
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