Atomic-Scale Friction on Stepped Surfaces of Ionic Crystals

Steiner, Pascal and Gnecco, Enrico and Krok, Franciszek and Budzioch, Janusz and Walczak, Lukasz and Konior, Jerzy and Szymonski, Marek and Meyer, Ernst. (2011) Atomic-Scale Friction on Stepped Surfaces of Ionic Crystals. Physical review letters, Vol. 106, H. 18 , 186104.

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Official URL: http://edoc.unibas.ch/dok/A6001652

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We report on high-resolution friction force microscopy on a stepped NaCl(001) surface in ultrahigh vacuum. The measurements were performed on single cleavage step edges. When blunt tips are used, friction is found to increase while scanning both up and down a step edge. With atomically sharp tips, friction still increases upwards, but it decreases and even changes sign downwards. Our observations extend previous results obtained without resolving atomic features and are associated with the competition between the Schwobel barrier and the asymmetric potential well accompanying the step edges.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Nanomechanik (Meyer)
UniBasel Contributors:Meyer, Ernst
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:11 Oct 2012 15:31
Deposited On:11 Oct 2012 15:21

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