title: Superconducting pair correlations in an amorphous insulating nanohoneycomb film.
abstract: The Cooper pairing mechanism that binds single electrons to form pairs in metals allows electrons to circumvent the exclusion principle and condense into a single superconducting or zero-resistance state. We present results from an amorphous bismuth film system patterned with a nanohoneycomb array of holes, which undergoes a thickness-tuned insulator-superconductor transition. The insulating films exhibit activated resistances and magnetoresistance oscillations dictated by the superconducting flux quantum h/2e. This 2e period is direct evidence indicating that Cooper pairing is also responsible for electrically insulating behavior.
authors.affiliation: Department of Physics, Brown University, 182 Hope Street, Providence, RI 02912, USA.
authors.forename: M D
authors.initials: MD
authors.lastname: Stewart
authors.forename: Aijun
authors.initials: A
authors.lastname: Yin
authors.forename: J M
authors.initials: JM
authors.lastname: Xu
authors.forename: James M
authors.initials: JM
authors.lastname: Valles