Dresden 2003 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Oberflächenphysik
O 32: Epitaxie und Wachstum II
O 32.9: Vortrag
Donnerstag, 27. März 2003, 17:00–17:15, FOE/ANOR
Interlayer mass transport in homoepitaxy on the atomic scale — •V.S. Stepanyuk1, O.V. Lysenko1,2, W. Hergert3, and J. Kirschner1 — 1Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany — 2Solid State Physics Department, Moscow State University, 119899 Moscow, Russia — 3Fachbereich Physik, Martin-Luther-Universität, Halle-Wittenberg, Friedemann-Bach-Platz 6, D-06099 Halle, Germany
Recently we have demonstrated that the island growth in the initial stages of transition metal heteroepitaxy and atomic motion on islands are determined by the size-dependent mesoscopic mismatch [1,2]. The size-dependent mesoscopic mismatch exists even in homoepitaxy [2], Performing atomic scale calculations for Cu islands on Cu(111), we demonstrate impact of the mesoscopic mismatch in homoepitaxy on strain and stress distributions in islands and the substrate. The interplay between the interlayer mass transport and the mesoscopic strain at the step edges is revealed. Our results for double layers Cu islands on Cu(111) show that shape transitions at the step edge caused by the mesoscopic mismatch strongly affect the interlayer mass transport.
[1] V.S. Stepanyuk, D.I. Bazhanov, A.N. Baranov, W. Hergert, P.H. Dederichs, and J. Kirschner, Phys. Rev. B 62, 15398 (2000); V.S. Stepanyuk, D.I. Bazhanov, W. Hergert, and J. Kirschner, Phys. Rev. B 63, 153406 (2001); D. Sander, S. Ouazi, V.S. Stepanyuk, D.I. Bazhanov, and J. Kirschner, Surf. Sci. 512, 281 (2002)
[2] O.V. Lysenko, V.S. Stepanyuk, W. Hergert, and J. Kirschner, Phys. Rev. Lett.89, 126102 (2002)