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Out-of-plane and in-plane actuation effects on atomic-scale friction

AutorFajardo, O. Y.; Gnecco, E.; Mazo, J. J.
Fecha de publicación2014
EditorAmerican Physical Society
CitaciónPhysical Review B 89: 075423 (2014)
ResumenThe influence of out-of-plane and in-plane contact vibrations and temperature on the friction force acting on a sharp tip elastically pulled on a crystal surface is studied using a generalized Prandtl-Tomlinson model. The average friction force is significantly lowered in a frequency range determined by the >washboard> frequency of the stick-slip motion and the viscous damping accompanying the tip motion. An approximately linear relationship between the actuation amplitude and the effective corrugation of the surface potential is derived in the case of in-plane actuation, extending a similar conclusion for out-of-plane actuation. Temperature causes an additional friction reduction with a scaling relation in formal agreement with the predictions of reaction rate theory in the absence of contact vibrations. In this case the actuation effects can be described by the effective energy or, more accurately, by introducing an effective temperature.
DescripciónUnder the terms of the Creative Commons Attribution License 3.0 (CC-BY).
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.89.075423
Identificadoresdoi: 10.1103/PhysRevB.89.075423
issn: 1098-0121
e-issn: 1550-235X
Aparece en las colecciones: (ICMA) Artículos
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