Lateral vibration effects in atomic-scale friction

Roth R. ; Fajardo O.Y. ; Mazo J.J. (Universidad de Zaragoza) ; Meyer E. ; Gnecco, E.

Resumen: The influence of lateral vibrations on the stick-slip motion of a nanotip elastically pulled on a flat crystal surface is studied by atomic force microscopy measurements on a NaCl(001) surface in ultra-high vacuum. The slippage of the nanotip across the crystal lattice is anticipated at increasing driving amplitude, similarly to what is observed in presence of normal vibrations. This lowers the average friction force, as explained by the Prandtl-Tomlinson model with lateral vibrations superimposed at finite temperature. Nevertheless, the peak values of the lateral force, and the total energy losses, are expected to increase with the excitation amplitude, which may limit the practical relevance of this effect.

Idioma: Inglés

DOI: 10.1063/1.4866427

Año: 2014

Publicado en: APPLIED PHYSICS LETTERS 104, 8 (2014), 083103 [4 pp]
ISSN: 0003-6951

Factor impacto JCR: 3.302 (2014)

Categ. JCR: PHYSICS, APPLIED rank: 21 / 141 = 0.149 (2014) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2011-25167
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2012-34487

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)