In this Letter we show that friction of anticorrugating systems can be dramatically decreased by applying an external load. The counterintuitive behavior that deviates from the macroscopic Amonton law is dictated by quantum mechanical effects that induce a transformation from anticorrugation to corrugation in the near-surface region. We describe the load-driven modifications occurring in the potential energy surface of different rare gas-metal adsorbate systems, namely, Ar, Kr, Xe on Cu(111), and Xe on Ag(111), and we calculate the consequent friction drop for the commensurate Xe/Cu system by means of combined ab initio and classical molecular dynamics simulations.

Pressure Induced Friction Collapse of Rare Gas Boundary Layers Sliding over Metal Surfaces / Righi, Maria Clelia; Ferrario, Mauro. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 99:(2007), pp. 1-4. [10.1103/PhysRevLett.99.176101]

Pressure Induced Friction Collapse of Rare Gas Boundary Layers Sliding over Metal Surfaces

RIGHI, Maria Clelia;FERRARIO, Mauro
2007

Abstract

In this Letter we show that friction of anticorrugating systems can be dramatically decreased by applying an external load. The counterintuitive behavior that deviates from the macroscopic Amonton law is dictated by quantum mechanical effects that induce a transformation from anticorrugation to corrugation in the near-surface region. We describe the load-driven modifications occurring in the potential energy surface of different rare gas-metal adsorbate systems, namely, Ar, Kr, Xe on Cu(111), and Xe on Ag(111), and we calculate the consequent friction drop for the commensurate Xe/Cu system by means of combined ab initio and classical molecular dynamics simulations.
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Pressure Induced Friction Collapse of Rare Gas Boundary Layers Sliding over Metal Surfaces / Righi, Maria Clelia; Ferrario, Mauro. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 99:(2007), pp. 1-4. [10.1103/PhysRevLett.99.176101]
Righi, Maria Clelia; Ferrario, Mauro
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/584361
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