Single-electron pass-transistor logic: operation of its elemental circuit

An elemental circuit for single-electron pass-transistor logic is fabricated on a silicon-on-insulator substrate. The circuit consists of two nearly-identical single-electron transistors, each with an individual input gate. By inputting pass signals to the sources and complementary signals to the gates, basic logic operations, including half sum and carry out of the half adder, are successfully achieved at 25 K. This is an experimental demonstration of an arithmetic operation by single-electron transistors.