Operation of a single dopant transistor. (a) Schematic illustration of a single-donor transistor, in this case a transistor that contains one donor in its nanoscale channel. (b) The conduction path donor mediates single-electron tunneling from source to drain, giving rise to a current peak in the low-temperature transfer characteristics (c).
Moraru et al. Nanoscale Research Letters 2011 6:479 doi:10.1186/1556-276X-6-479