Date Published:

DEC 9

Abstract:

Electrical spectroscopy of a heteroatomic molecule-like shallow-donor pair in silicon can switch the molecule between two ionic states of opposite polarities. We study this charge reorganization theoretically by solving the time-dependent Schroedinger equation on a grid using an effective mass model. The ability to control the charge reorganization by applying external electrical fields is then used to design a cyclable full-adder that operates as a nonlinear finite state machine. The logic operations, equivalent to 32 switches, are implemented by realistic pulse voltages that induce diabatic and adiabatic charge transfer between the wells of the two donors. A RF-SET is used for the read out by charge detection.