Perfect' transistor built from a single atom
Physicists have created a working transistor using only a single phosphorus atom placed precisely in a silicon crystal.
The development could mark a big step towards quantum computing. While single-atom transistors have beenproduced before, it's been by chance, with researchers either searching through many devices or tuning multi-atom devices to isolate one that works.
"But this device is perfect", says Professor Michelle Simmons, group leader and director of the ARC Centre for Quantum Computation and Communication at the University of New South Wales.