title: Phase Transitions in Spin-Crossover Thin Films Probed by Graphene Transport Measurements.
abstract: Future multifunctional hybrid devices might combine switchable molecules and 2D material-based devices. Spin-crossover compounds are of particular interest in this context since they exhibit bistability and memory effects at room temperature while responding to numerous external stimuli. Atomically thin 2D materials such as graphene attract a lot of attention for their fascinating electrical, optical, and mechanical properties, but also for their reliability for room-temperature operations. Here, we demonstrate that thermally induced spin-state switching of spin-crossover nanoparticle thin films can be monitored through the electrical transport properties of graphene lying underneath the films. Model calculations indicate that the charge carrier scattering mechanism in graphene is sensitive to the spin-state dependence of the relative dielectric constants of the spin-crossover nanoparticles. This graphene sensor approach can be applied to a wide class of (molecular) systems with tunable electronic polarizabilities.
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, 2628 CJ Delft, The Netherlands.
authors.forename: J
authors.identifier: 0000-0002-4384-1315
authors.initials: J
authors.lastname: Dugay
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, 2628 CJ Delft, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Aarts
authors.affiliation: Instituto de Ciencia Molecular (ICMol), Universidad de Valencia , c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.|Institut Lavoisier, UMR CNRS 8180, Université de Versailles Saint-Quentin-en-Yvelines , 45 Av. des Etats-Unis, 78035 Versailles cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Giménez-Marqués
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, 2628 CJ Delft, The Netherlands.
authors.forename: T
authors.initials: T
authors.lastname: Kozlova
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, 2628 CJ Delft, The Netherlands.
authors.forename: H W
authors.initials: HW
authors.lastname: Zandbergen
authors.affiliation: Instituto de Ciencia Molecular (ICMol), Universidad de Valencia , c/Catedrático José Beltrán, 2, 46980 Paterna, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Coronado
authors.affiliation: Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, 2628 CJ Delft, The Netherlands.
authors.forename: H S J
authors.initials: HS
authors.lastname: van der Zant
keywords: Bistability; graphene; molecular electronics; molecular spintronics; nanoparticles; spin-crossover