Regensburg 2004 – wissenschaftliches Programm
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O: Oberflächenphysik
O 14: Postersitzung (Adsorption an Oberflächen, Epitaxie und Wachstum, Organische Dünnschichten, Oxide und Isolatoren, Phasenübergänge, Rastersondentechniken, Struktur und Dynamik reiner Oberflächen)
O 14.37: Poster
Montag, 8. März 2004, 18:00–21:00, Bereich C
Experimental and ab initio studies of ultrathin Ag films on V(100) — •Marko Kralj1,2, Predrag Lazic3, Jörg Schneider1, Axel Rosenhahn1, Petar Pervan2, Milorad Milun2, Zeljko Crljen3, Radovan Brako3, and Klaus Wandelt1 — 1Institut für Physikalische Chemie, Bonn — 2Institute of Physics, Zagreb — 3Rudjer Boskovic Institute, Zagreb
The growth and structure of ultrathin silver films (1-5 ML) deposited on a reconstructed V(100)-(5x1) surface are studied by use of STM, AES, and ARPES. To model the structure of the system we have also performed first principles calculations.
It has been established that due to the annealing of deposited silver uniform films are formed and that the vanadium reconstruction is completely removed. As found from STM measurements and supported by ab initio calculations in the in-plane direction silver follows the structure of the V(100)-(1x1) lattice and is tetragonally distorted in the direction perpendicular to the surface. The ab initio results predicted the adsorption energies of individual silver layers and the work function of Ag/V(100) in accordance with experiments.