Anisotropic surface coupling while sliding on dolomite and calcite crystals

Carlos M. Pina, Rodolfo Miranda, and Enrico Gnecco
Phys. Rev. B 85, 073402 – Published 6 February 2012

Abstract

High-resolution friction force microscopy has been performed on the (104) surfaces of dolomite and calcite in deionized water. The two rows of oxygen atoms alternating in a zigzag way on top of both surfaces are resolved with similar contrast while scanning along the [421¯] direction. Along the [010] direction, only one row is resolved, provided that the normal loading is large enough. The direction-dependent interaction between the probing tip and surface atoms is explained by numeric calculations based on the Prandtl-Tomlinson model.

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  • Received 21 December 2011

DOI:https://doi.org/10.1103/PhysRevB.85.073402

©2012 American Physical Society

Authors & Affiliations

Carlos M. Pina1, Rodolfo Miranda2,3, and Enrico Gnecco2

  • 1Department of Crystallography and Mineralogy, Complutense University of Madrid, E-28040 Madrid, Spain
  • 2Instituto Madrileño de Estudios Avanzados, IMDEA Nanociencia, Campus Universitario de Cantoblanco, E-28049 Madrid, Spain
  • 3Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain

  • *enrico.gnecco@imdea.org

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Vol. 85, Iss. 7 — 15 February 2012

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