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Phys. Rev. E 68, 011506 (2003) [11 pages]

Dynamics and melting of a thin confined film

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O. M. Braun
Institute of Physics, National Academy of Sciences of Ukraine, 03650 Kiev, Ukraine

M. Peyrard
Laboratoire de Physique de l’Ecole Normale Supérieure de Lyon, 46 Allée d’Italie, 69364 Lyon Cédex 07, France

Received 5 December 2002; published 23 July 2003

Molecular dynamics is used to investigate the melting of a thin lubricant film confined between two crystalline surfaces. The dynamics of the film is significantly affected by the substrate, both in the solid and in the molten phases. The solid phase, able to sustain shear stress, shows, however, large diffusional motions of the atoms. The melting temperature depends strongly on the confinement. A phenomenological microscopic theory, based on the Lindemann criterion, is proposed to explain this effect.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.68.011506
DOI:
10.1103/PhysRevE.68.011506
PACS:
64.70.Dv, 68.08.-p