title: Superconductivity-related insulating behavior.
abstract: We present the results of an experimental study of superconducting, disordered, thin films of amorphous indium oxide. These films can be driven from the superconducting phase to a reentrant insulating state by the application of a perpendicular magnetic field (B). We find that the high-B insulator exhibits activated transport with a characteristic temperature, TI. TI has a maximum value (TpI) that is close to the superconducting transition temperature (Tc) at B=0, suggesting a possible relation between the conduction mechanisms in the superconducting and insulating phases. Tp(I) and Tc display opposite dependences on the disorder strength.
authors.affiliation: Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: G
authors.initials: G
authors.lastname: Sambandamurthy
authors.forename: L W
authors.initials: LW
authors.lastname: Engel
authors.forename: A
authors.initials: A
authors.lastname: Johansson
authors.forename: D
authors.initials: D
authors.lastname: Shahar