Experimental determination of the helium-metal interaction potential by interferometry of nanostructured surfaces

Huang, C., MacLaren, D.A. , Ellis, J. and Allison, W. (2006) Experimental determination of the helium-metal interaction potential by interferometry of nanostructured surfaces. Physical Review Letters, 96(12), p. 126102. (doi:10.1103/PhysRevLett.96.126102)

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Abstract

We present a direct experimental comparison of the helium-surface interaction potential for two unreconstructed metal surfaces. We analyze phase shifts in helium atom scattering from a nanostructured bimetallic surface to yield the relative shape and position of an adsorbate's potential with respect to the reference defined by the substrate. In our prototype system, submonolayer growth of Ni on Cu(100), the He-Ni/Cu(100) potential has an attractive well that is 1.6±0.4 meV shallower, and a repulsive wall 0.11±0.03 Å closer to the ion cores, compared to the He-Cu(100) potential. Our observations provide a ready test of state-of-the-art theoretical calculations.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:MacLaren, Dr Donald
Authors: Huang, C., MacLaren, D.A., Ellis, J., and Allison, W.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114
Published Online:28 March 2006

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