Atomic exchange processes and bimodal initial growth of Co/Cu(001)

Nouvertné, F.; May, U.; Bamming, M.; Rampe, A.; Korte, U.; Güntherodt, G.; Pentcheva, Rossitza und Scheffler, Matthias (1999): Atomic exchange processes and bimodal initial growth of Co/Cu(001). In: Physical Review B - Condensed Matter and Materials Physics, Bd. 60, Nr. 20: S. 14382-14386

Abstract

The initial growth of Co on Cu(001) is atomically identified by scanning tunneling microscopy using CO titration and density-functional theory total-energy calculations. Both reveal that at low coverage Co adatoms occupy substitutional sites in the Cu substrate surface that act as pinning centers for subsequent island nucleation. The interaction with diffusing adatoms is found to be attractive and stronger for nearest-neighbor Co compared to Cu. The atomic substitution process actuates a bimodal growth mode as experimentally found in the island size distributions. This gives rise to a high density of small Co islands and large Co-decorated Cu islands.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften > Kristallographie und Materialwissenschaft
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik ; 500 Naturwissenschaften und Mathematik > 540 Chemie ; 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• Sprache: Englisch