Home > Publications database > Gate-induced transition between metal-type and thermally activated transport in self-catalyzed MBE-grown InAs nanowires > print

001     150473
005     20210129213204.0
024 7 _ |a 10.1088/0957-4484/24/32/325201
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024 7 _ |a 1361-6528
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024 7 _ |a 0957-4484
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037 _ _ |a FZJ-2014-00528
041 _ _ |a English
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100 1 _ |a Blömers, Christian
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245 _ _ |a Gate-induced transition between metal-type and thermally activated transport in self-catalyzed MBE-grown InAs nanowires
260 _ _ |a Bristol
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336 7 _ |a Journal Article
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520 _ _ |a Electronic transport properties of InAs nanowires are studied systematically. The nanowires are grown by molecular beam epitaxy on a SiOx-covered GaAs wafer, without using foreign catalyst particles. Room-temperature measurements revealed relatively high resistivity and low carrier concentration values, which correlate with the low background doping obtained by our growth method. Transport parameters, such as resistivity, mobility, and carrier concentration, show a relatively large spread that is attributed to variations in surface conditions. For some nanowires the conductivity has a metal-type dependence on temperature, i.e. decreasing with decreasing temperature, while other nanowires show the opposite temperature behavior, i.e. temperature-activated characteristics. An applied gate voltage in a field-effect transistor configuration can switch between the two types of behavior. The effect is explained by the presence of barriers formed by potential fluctuations.
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700 1 _ |a Rieger, Torsten
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700 1 _ |a Grap, T
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700 1 _ |a Raux, M
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700 1 _ |a Lepsa, Mihail Ion
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700 1 _ |a Lüth, Hans
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700 1 _ |a Grützmacher, Detlev
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700 1 _ |a Schäpers, Thomas
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773 _ _ |a 10.1088/0957-4484/24/32/325201
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856 4 _ |u http://iopscience.iop.org/0957-4484/24/32/325201/pdf/0957-4484_24_32_325201.pdf
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