Probing nanofriction and Aubry-type signatures in a finite self-organized system

Nature Communications
J KietheT E Mehlstäubler

Abstract

Friction in ordered atomistic layers plays a central role in various nanoscale systems ranging from nanomachines to biological systems. It governs transport properties, wear and dissipation. Defects and incommensurate lattice constants markedly change these properties. Recently, experimental systems have become accessible to probe the dynamics of nanofriction. Here, we present a model system consisting of laser-cooled ions in which nanofriction and transport processes in self-organized systems with back action can be studied with atomic resolution. We show that in a system with local defects resulting in incommensurate layers, there is a transition from sticking to sliding with Aubry-type signatures. We demonstrate spectroscopic measurements of the soft vibrational mode driving this transition and a measurement of the order parameter. We show numerically that both exhibit critical scaling near the transition point. Our studies demonstrate a simple, well-controlled system in which friction in self-organized structures can be studied from classical- to quantum-regimes.

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Citations

Sep 2, 2019·The Review of Scientific Instruments·P ObšilL Slodička
Jan 18, 2018·Physical Review Letters·Ian CountsVladan Vuletić
Aug 18, 2018·Beilstein Journal of Nanotechnology·Andrea VanossiNicola Manini
Mar 21, 2018·Proceedings of the National Academy of Sciences of the United States of America·Tommaso ZancaErio Tosatti
Sep 18, 2020·Nature Communications·Andrea VanossiMichael Urbakh
May 20, 2021·ACS Applied Materials & Interfaces·Mingyue WangShaoze Yan

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