title: Role of surface roughness in superlubricity.
abstract: We study the sliding of elastic solids in adhesive contact with flat and rough interfaces. We consider the dependence of the sliding friction on the elastic modulus of the solids. For elastically hard solids with planar surfaces with incommensurate surface structures we observe extremely low friction (superlubricity), which very abruptly increases as the elastic modulus decreases. We show that even a relatively small surface roughness may completely kill the superlubricity state.
authors.affiliation: IFF, FZ-Jülich, 52425 Jülich, Germany. Democritos National Simulation Center, Via Beirut 2, 34014 Trieste, Italy.
authors.forename: U
authors.initials: U
authors.lastname: Tartaglino
authors.forename: V N
authors.initials: VN
authors.lastname: Samoilov
authors.forename: B N J
authors.initials: BN
authors.lastname: Persson