Scientists from the University of New South Wales have developed the world’s smallest transistor that is made up of a single atom.
The team of researchers precisely placed the phosphorus-31 isotope on the Silicon base in an ultra-high vacuum chamber with the help of a Scanning Tunneling Microscope (STM) and developed a single atom transistor, which could be a better foundation for scalable quantum computing. Scientists have precisely positioned the atom, so that it must be at an effective place with reduced error margin.
“Our group has proved that it is really possible to position one phosphorus atom in a silicon environment - exactly as we need it - with near-atomic precision, and at the same time register gates,” lead author Dr. Martin Fuechsle from UNSW said.
Phosphorus-31 has been selected by the researchers as it has two possible nuclear spins and it could be an ideal isotope for solid-state quantum computing. Moreover, phosphorus and silicon would be compatible with the CMOS sensors used in processors these days.