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Journal of Low Temperature Physics

, Volume 176, Issue 1–2, pp 82–92 | Cite as

Boundary Tension at the Interface of Nanoscopic Helium Films on an Heterogeneous Substrate

  • E. S. Hernández
Article

Abstract

This paper reports the first calculation of the two-dimensional interfacial profile and energetics of nanoscopically thin films of helium, on an heterogeneous planar substrate consisting of two adjoining metals. The calculations are performed in the frame of density functional theory at zero temperature, with the purpose of identifying the formation process of the interface at the boundary between the two substrates when few atomic layers are involved, to elucidate the possible relationship of the magnitude of the boundary tension with the displacement of layers between the half films, and to extract keys to organize future calculations of film coexistence at finite temperatures.

Keywords

Helium films Heterogenous substrates Interfacial tension 

PACS

05.30.Jp 05.70.Np 67.25.bh 67.60.gj 

Notes

Acknowledgments

The author is thankful to F. Ancilotto, M. Barranco and M. Pi for interesting conversations and for many valuable computational hints, and to M. Cole for critical comments. This work was performed with partial support from Grants PIP 0546 from CONICET, UBACYT 01/K156 from University of Buenos Aires and PICT 2011/1217 from ANPCYT, Argentina.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Departamento de Física, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
  2. 2.Instituto de Física de Buenos AiresConsejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina

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