Size-effects in indium gallium arsenide nanowire field-effect transistors

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Abstract

We fabricate and analyze InGaAs nanowire MOSFETs with channel widths down to 18 nm. Low-temperature measurements reveal quantized conductance due to subband splitting, a characteristic of 1D systems. We relate these features to device performance at room-temperature. In particular, the threshold voltage versus nanowire width is explained by direct observation of quantization of the first sub-band, i.e., band gap widening. An analytical effective mass quantum well model is able to describe the observed band structure. The results reveal a compromise between reliability, i.e., VT variability, and on-current, through the mean free path, in the choice of the channel material.

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  • Nano Technology
Original languageEnglish
Article number063505
JournalApplied Physics Letters
Volume109
Issue number6
Publication statusPublished - 2016 Aug 8
Publication categoryResearch
Peer-reviewedYes