title: A superconducting field-effect switch.
abstract: We report here on a novel realization of a field-effect device that allows switching between insulating and superconducting states, which is the widest possible variation of electrical properties of a material. We chose C(60) as the active material because of its low surface state density and observed superconductivity in alkali metal-doped C(60). We induced three electrons per C(60) molecule in the topmost molecular layer of a crystal with the field-effect device, creating a superconducting switch operating up to 11 kelvin. An insulator was thereby transformed into a superconductor. This technique offers new opportunities for the study of superconductivity as a function of carrier concentration.
authors.affiliation: Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974, USA. Departments of Chemistry and Physics and Advanced Carbon Materials Center, University of Kentucky, Lexington, KY 40506, USA.
authors.forename: J H
authors.initials: JH
authors.lastname: Schon
authors.forename: C
authors.initials: C
authors.lastname: Kloc
authors.forename: R C
authors.initials: RC
authors.lastname: Haddon
authors.forename: B
authors.initials: B
authors.lastname: Batlogg