Towards high mobility InSb nanowire devices

Ö. Gül, D.J. van Woerkom, I. van Weperen, D. Car, S.R. Plissard, E.P.A.M. Bakkers, L.P. Kouwenhoven

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Abstract

We study the low-temperature electron mobility of InSb nanowires. We extract the mobility at 4.2 K by means of field effect transport measurements using a model consisting of a nanowire-transistor with contact resistances. This model enables an accurate extraction of device parameters, thereby allowing for a systematic study of the nanowire mobility. We identify factors affecting the mobility, and after optimization obtain a field effect mobility of ∼2.5 × 104 cm2 V-1 s-1. We further demonstrate the reproducibility of these mobility values which are among the highest reported for nanowires. Our investigations indicate that the mobility is currently limited by adsorption of molecules to the nanowire surface and/or the substrate.

Original languageEnglish
Article number215202
JournalNanotechnology
Volume26
Issue number21
DOIs
Publication statusPublished - 29 May 2015

Keywords

  • adsorption
  • field effect mobility
  • nanofabrication
  • nanowire FET
  • nanowire transistor

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