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Role of van der Waals interactions in adsorption of Xe on Cu(111) and Pt(111)

Lazić, Predrag; Crljen, Željko; Brako, Radovan; Gumhalter, Branko (2005) Role of van der Waals interactions in adsorption of Xe on Cu(111) and Pt(111). Physical Review B, 72 (24). pp. 245407-1. ISSN 1098-0121

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Abstract

We consider some recently developed schemes for treating van der Waals interactions within the density functional theory on the widely discussed example of adsorption of Xe on Cu(111) and Pt(111) surfaces. Consistent with the overall weakness of the Xe-surface and Xe-Xe interactions we assess the performance of the schemes that are appropriate to systems consisting of nearly isolated fragments in which the coefficients of the van der Waals expansion are deduced from DFT calculations. Such generalized DFT calculations of potential energy surfaces yield the structure of Xe adlayers in good agreement with experiments and retrieve the dilation of commensurate monolayer phase in which the intralayer Xe-Xe radial force constants are strongly reduced. This provides a first principles interpretation of the observed vibrational properties of adlayers, in general, and the much debated dispersion of in-plane polarized vibrations, in particular.

Item Type: Article
Uncontrolled Keywords: van der Waals interactions; Xe adsorption; Cu surface; Pt surface
Subjects: NATURAL SCIENCES > Physics > Condensed Matter Physics
Divisions: Theoretical Physics Division
Projects:
Project titleProject leaderProject codeProject type
Fizika površina, mikrostruktura i jako koreliranih sistemaUNSPECIFIED0098001UNSPECIFIED
Modeliranje svojstava mikro- i nanostrukturiranih površinaUNSPECIFIED0035017UNSPECIFIED
Depositing User: Predrag Lazić
Date Deposited: 31 Jan 2013 13:53
Last Modified: 22 Jan 2014 15:19
URI: http://fulir.irb.hr/id/eprint/488
DOI: 10.1103/PhysRevB.72.245407

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