Transverse thermal depinning and nonlinear sliding friction of an adsorbed monolayer |
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Authors: | Granato E Ying S C |
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Institution: | Laboratório Associado de Sensores e Materiais, Instituto Nacional de Pesquisas Espaciais, 12201-190 S?o José dos Campos, S?o Paulo, Brazil. |
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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. |
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