Evidence for transfer of polarization in a quantum dot cellular automata cell consisting of semiconductor quantum dots
Spiros Gardelis, Charles G. Smith, J. R. Cooper, D. A. Ritchie, E. H. Linfield, Y. W. Jin · Physical review. B, Condensed matter · 2003
We present evidence for quantum dot cellular automata action in a cell consisting of four dots defined by submicron metal gates on the top surface of a molecular-beam-epitaxy-grown GaAs/AlGaAs heterostructure in which a two-dimensional electron gas layer was formed approximately 70 nm below the surface. The four-dot cell is separated by a strong barrier in two double-dot sets. We show that by polarizing one of the double-dot sets we can polarize the other set in the cell. The polarization is detected using noninvasive voltage probe without drawing electric currents from the cell.