A simple and controlled single electron transistor based on doping modulation in silicon nanowires

Details A simple and controlled single electron transistor based on doping modulation in silicon nanowires A simple and controlled single electron transistor based on doping modulation in silicon nanowires

2006-09-11

arxiv.org/abs/cond-mat/0609245v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to be published in Applied Physics Letters

Scientific paper

10.1063/1.2358812

A simple and highly reproducible single electron transistor (SET) has been fabricated using gated silicon nanowires. The structure is a metal-oxide-semiconductor field-effect transistor made on silicon-on-insulator thin films. The channel of the transistor is the Coulomb island at low temperature. Two silicon nitride spacers deposited on each side of the gate create a modulation of doping along the nanowire that creates tunnel barriers. Such barriers are fixed and controlled, like in metallic SETs. The period of the Coulomb oscillations is set by the gate capacitance of the transistor and therefore controlled by lithography. The source and drain capacitances have also been characterized. This design could be used to build more complex SET devices.

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