OPERATION OF LOGIC FUNCTION IN A COULOMB-BLOCKADE DEVICE

This letter presents the experimental demonstration of a Coulomb block ade (CB) logic device. Our logic architecture consists of an array of current pathways, controlled by CB switching nodes. In this architectu re, high gain is not required to transmit information, making it well suited to the CB device. Each CB node is switched between a blockaded state and a completely pinched-off state, minimizing the influence of stray potentials. Using a multi-phase clocking scheme to precisely con trol electron flow, the AND logic function is observed using as few as 160 electrons. (C) 1998 American Institute of Physics. [S0003-6951(98 )01043-2].