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MOLECULAR DYNAMICS STUDY OF THE FRICTION PROPERTIES FOR AGeTIP–SURFACE SYSTEM

Author

Listed:
  • JUN CAI

    (Singapore-MIT Alliance and Department of Computational Science, National University of Singapore, Singapore 119260, Singapore)

  • JIAN-SHENG WANG

    (Singapore-MIT Alliance and Department of Computational Science, National University of Singapore, Singapore 119260, Singapore)

Abstract

The friction between a Ge tip and its (001)-(2 × 1)reconstructed surface is investigated by molecular dynamics (MD) simulation. It is found that when the tip and the substrate approach each other closely enough, a wear occurs under slip-stick way. At the same time, it is also found that a permanent damage occurs when the tip advances perpendicularly to the dimer rows of the surface, while such damage is not observed when the tip moves parallelly to the dimer rows. This is different from the friction phenomena on a macroscopic scale. At the microscopic level, the resulting atomic configuration and the properties of friction force vs. sliding distance depend strongly on a sliding direction.

Suggested Citation

  • Jun Cai & Jian-Sheng Wang, 2001. "MOLECULAR DYNAMICS STUDY OF THE FRICTION PROPERTIES FOR AGeTIP–SURFACE SYSTEM," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 8(05), pages 581-586.
    • Handle: RePEc:wsi:srlxxx:v:08:y:2001:i:05:n:s0218625x01001476
    DOI: 10.1142/S0218625X01001476
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