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• W1680058825 abstract "We propose an ultra-thin (∼3 nm) InGaN-channel high electron mobility transistor (HEMT) structure with two-dimensional electron gas (2DEG) mobility of over 1000cm2/Vs at room temperature (RT). This structure suppresses alloy-disorder scattering in the channel because part of the 2DEG penetrates into the GaN buffer layer. All the AlGaN/InGaN/GaN heterostructures were grown on a (0 0 0 1) sapphire substrate using two-flow atmospheric metalorganic chemical vapor deposition (MOCVD). As a result, we achieved 2DEG mobility of 1110cm2/Vs with a sheet carrier density of 1.31×1013cm-2 at RT, which is the highest mobility reported to date for an InGaN-channel structure. Excellent electron confinement was also observed compared to a conventional AlGaN/GaN heterostructure, despite the use of a very thin InGaN-channel. We also investigated the relationship between the density of the 2DEG and strain relaxation in InGaN-channel structures. Strain relaxation in the InGaN layer was enhanced by an increase in thickness with the result that the negative polarization charge drastically decreased at the InGaN/GaN interface. Thus, the potential at the interface dropped and the 2DEG density increased." @default.
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• W1680058825 date "2004-12-01" @default.
• W1680058825 modified "2023-10-18" @default.
• W1680058825 title "MOCVD-grown InGaN-channel HEMT structures with electron mobility of over" @default.
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• W1680058825 doi "https://doi.org/10.1016/j.jcrysgro.2004.08.071" @default.
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