title: Transverse thermal depinning and nonlinear sliding friction of an adsorbed monolayer.
abstract: We study the response of an adsorbed monolayer under a driving force as a model of sliding friction phenomena between two crystalline surfaces with a boundary lubrication layer. Using Langevin-dynamics simulation, we determine the nonlinear response in the direction transverse to a high symmetry direction along which the layer is already sliding. We find that below a finite transition temperature there exist a critical depinning force and hysteresis effects in the transverse response in the dynamical state when the adlayer is sliding smoothly along the longitudinal direction.
authors.affiliation: Laboratório Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais, 12201-190 São José dos Campos, São Paulo, Brazil.
authors.forename: E
authors.initials: E
authors.lastname: Granato
authors.forename: S C
authors.initials: SC
authors.lastname: Ying
mesh_terms: D000327:Adsorption; D001704:Biopolymers / Q000032:analysis / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D003198:Computer Simulation; D017276:Friction; D008956:Models, Chemical; D009038:Motion; D017711:Nonlinear Dynamics; D013696:Temperature
chemical_list: D001704:Biopolymers; D020099:Coated Materials, Biocompatible