Stephen's recent research has been into the ac quantum Hall effect as a possible primary impedance standard, novel semiconductors for higher-temperature quantum Hall effect measurements, ac impedance bridges and cryogenic current comparator development.
Stephen studied physics at Bristol University, receiving a PhD in experimental solid-state physics in 1997.
His thesis research was on magnetic properties of the then very new mercury-based high temperature superconductors.
He joined the National Physical Laboratory in 1997, and has worked since then on single-electron transport in metallic, semi conducting and superconducting nano-structures. In addition, Stephen has worked on many projects related to quantum electrical metrology and precise measurement of electrical quantities.
Tel: +44 20 8943 7161