AVS 45th International Symposium
    Surface Science Division Thursday Sessions
       Session SS1+NS-ThM

Paper SS1+NS-ThM4
The Kinetic Nature of Slope Selection during Unstable Growth

Thursday, November 5, 1998, 9:20 am, Room 308

Session: Growth and Thin Films
Presenter: S. van Dijken, University of Twente, The Netherlands
Authors: S. van Dijken, University of Twente, The Netherlands
L.C. Jorritsma, University of Twente, The Netherlands
B. Poelsema, University of Twente, The Netherlands
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At temperatures below 320 K, the Cu(001) transforms into an arrangement of facets upon epitaxial growth, resulting in a pyramidlike surface morphology. The sides of the pyramids all have the same facet orientation, selected by the growth temperature. With increasing growth temperature, [113], [115] and [117] facet faces are obtained.@footnote 1,2@ Up to now, it is not clear whether this slope selection is determined by local equilibrium or by the kinetics of the growth process. We present evidence for the kinetic origin of this phenomenon. At the same temperature various facet orientations can be obtained, depending on the angle of incidence of the impinging adatoms. We will show that the observed slope selection can be explained by the refraction of atoms above the surface. @FootnoteText@ @footnote 1@H.J. Ernst, F.Fabre, R. Folkerts and J. Lapujoulade, Phys. Rev. Lett. 72, 112 (1994) @footnote 2@L.C. Jorritsma, M. Bijnagte, G. Rosenfeld and B. Poelsema, Phys. Rev. Lett. 78, 911 (1997)