Fanout gate in quantum-dot cellular automata
Kameshwar K. Yadavalli, Alexei O. Orlov, John Timler, Craig S. Lent, Gregory L. Snider · Nanotechnology · 2007
We present an experimental demonstration of a fanout gate for quantum-dot cellular automata (QCA), where a signal applied to a single input cell is amplified by that cell and sent to two output cells. Each cell is a single-electron latch composed of three metal dots, which are connected in series by tunnel junctions. Binary information is represented by an excess electron localized to one of the two peripheral metal dots of each latch. Fanout is demonstrated by writing a bit to the input latch and then simultaneously transferring the bit to both output latches using two-phase clocking.