Patent ID: 6369404
Filing Date: 2002-04-09
Classification: B82Y,G06N,H01L,Y10S

Abstract:
An electron device for single spin measurement, comprising:a semiconductor substrate into which at least one donor atom is introduced to produce a donor nuclear spin electron system having large electron wave functions at the nucleus of the donor atom; an insulating layer above the substrate; a first conducting gate on the insulating layer above the donor atom to control the energy of the bound electron state at the donor; a second conducting gate on the insulating layer adjacent the first gate to generate at least one electron in the substrate; wherein in use, a single electron is bound to the donor, and the donor atom is weakly coupled to the at least one electron in the substrate, the gates are biased so that the at least one electron in the substrate will move to the donor, but only if the spins of the at least one electron and the donor are in a relationship which permits the movement; wherein the arrangement is such that detection of current flow, or even movement of a single electron, in the device constitutes a measurement of a single spin.