Electrical Conductivity of InN Nanowires and the Influence of the Native Indium Oxide Formed at Their Surface
- 16 March 2009
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 9 (4), 1567-1571
- https://doi.org/10.1021/nl8036799
Abstract
The electrical properties of InN nanowires were investigated in four-point probe measurements. The dependence of the conductance on the wire diameter allows distinguishing between "core" bulk (quadratic) and "shell" sheet (linear) contributions. Evidence of the formation of a thin In(2)O(3) layer at the surface of the nanowires is provided by X-ray core level photoemission spectroscopy. The shell conductivity is therefore ascribed to an electron accumulation layer forming at the radial InN/In(2)O(3) interface. Although conductance through the accumulation layer dominates for nanowires below a critical diameter of about 55 nm, the core channel cannot be neglected, even for small nanowires.Keywords
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