Tailoring the carrier mobility of semiconducting nanowires by remote dielectrics

TL;DR

This paper demonstrates that coating semiconducting nanowires with high-k dielectrics significantly reduces Coulomb impurity scattering, thereby enhancing charge carrier mobility within the nanowires.

Contribution

It introduces a method to improve nanowire charge transport by using remote high-k dielectric coatings to suppress impurity scattering.

Findings

High-k dielectric coatings damp Coulomb impurity scattering

Mobility of free charges in nanowires increases with dielectric coating

Remote dielectric environment influences nanowire charge transport

Abstract

The dielectric environment of thin semiconductor nanowires can affect the charge transport properties inside the wire. In this work, it is shown that Coulomb impurity scattering inside thin nanowires can be damped strongly by coating the wire with a high-k dielectric. This will lead to an increase in the mobility of free charges inside the wire.