title: Conductance oscillations in molecularly linked Au nanoparticle film-superconductor systems.
abstract: Charge transport across a disordered normal-superconductor (DN-S) interface was studied using a macroscopic, molecularly linked Au nanoparticle film as the DN component. Low-temperature conductance versus voltage and magnetic field exhibit zero-bias and zero-field peaks, respectively. Importantly, the latter typically exhibit superimposed oscillations. Such oscillations are rarely seen in other DN-S systems and are remarkable given their robustness in these macroscopic films and interfaces. A number of observations indicate that conductance peaks and oscillations arise due to a 'reflectionless tunnelling' process. Scattering length scales extracted from the data using a reflectionless tunnelling picture are consistent with literature values. Factors resulting in the observation of oscillations in this system are discussed.
authors.affiliation: Department of Chemistry, University of Toronto, Toronto, ON, M5S 3H6, Canada.
authors.forename: Jeffrey L
authors.initials: JL
authors.lastname: Dunford
authors.forename: Al-Amin
authors.initials: AA
authors.lastname: Dhirani