ROUGHNESS INFLUENCE ON SURFACE MELTING

Fray de Landa Castillo Alvarado, Margarito Cruz Pineda, Jerzy H. Rutkowski and Leszek Wojtczak
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Fray de Landa Castillo Alvarado: Escuela Superior de Fisica y Matemáticas IPN, Edif.9, U.P. "ALM," Zacatenco, México DF 07738, Mexico
Margarito Cruz Pineda: Escuela Superior de Fisica y Matemáticas IPN, Edif.9, U.P. "ALM," Zacatenco, México DF 07738, Mexico
Jerzy H. Rutkowski: Department of Solid State Physics, University of Łódź, ul. Pomorska, 149/153, 90-236 Łódź, Poland
Leszek Wojtczak: Department of Solid State Physics, University of Łódź, ul. Pomorska, 149/153, 90-236 Łódź, Poland

Surface Review and Letters (SRL), 2001, vol. 08, issue 06, 599-608

Abstract: The influence of surface roughness on surface melting phase transition is discussed within the molecular field theory. The roughness is characterized by the surface order parameter averaged over all the density fluctuations whose description corresponds to the discrete Gaussian solid-on-solid model. The potential governing the transition between the rough surface and the surface melting is considered in terms of the modified van der Waals equation of state. Its effective shape represents two intersecting parabolas with nonequal curvatures for the solid and liquid phases. The phase diagram shows the coexistence of two phases with rough and wet surfaces.

Date: 2001
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DOI: 10.1142/S0218625X01001531

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