• December 2009
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Single-Atom Transistors Are the Smallest Yet.

PC World (12/04/09) Springmann, Alessondra

A team of researchers from Finland and Australia has discovered a functional transistor that has an active region composed of a single atom. Quantum tunneling is used to move electrons between the single phosphorus atom and the leads of the transistor. The tiny device offers precise control of the changes in voltage on an electrode, which could mean a new generation of atom-scale processors might lead to nano-scale electronics such as computers and other devices. The team’s focus was not “to build the tiniest transistor for a classical computer, but a quantum bit, which would be the heart of a quantum computer that is being developed worldwide,” says Mikko Mottonen, one of the project’s researchers.

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