Ordered phases of potassium on Pt{l_brace}111{r_brace}: Experiment and theory

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.9246· OSTI ID:627814

More, S; Berndt, W; Bradshaw, A M ^[1]; Stumpf, R ^[2]

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1. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195Berlin (Germany)
2. Sandia National Laboratories, Albuquerque, New Mexico87185-1413 (United States)

Using low-energy electron diffraction structural analysis and first-principles calculations based on the local-density approximation we have investigated the ({radical} (3) {times}{radical} (3) )R30{degree} K and (2{times}2) K overlayers on Pt{l_brace}111{r_brace}. The measured and calculated adsorption geometries agree quantitatively. In both phases the K adatoms occupy threefold symmetric hcp hollow sites, the preference for the hcp site over the fcc site being a consequence of the polarization of the surface Pt d electrons. We have not found any indication of K incorporation into the Pt{l_brace}111{r_brace} surface, as has been recently suggested. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 627814
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 15 Vol. 57; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ADSORPTION
CRYSTAL STRUCTURE
ELECTRON DIFFRACTION
LAYERS
PLATINUM
POTASSIUM
SUBSTRATES
SURFACES