Abstract
Submonolayers of nickel oxide films were grown on an Ag(001) by pulsed laser deposition, and characterized in situ by both scanning tunneling microscopy and x-ray photoelectron spectroscopy. We observed quasi-two-dimensional growth of the film, and clearly identified several kinds of defects, such as embedded metallic Ni clusters and, notably, oxygen atoms, even while looking deeply into the substrate. These originated from Ni and O hyperthermal projectiles as well as from NiO clusters that were formed during laser ablation of a NiO target. Those defects played a role of nucleation sites in extending the nucleation stage of thin-film growth.
| Original language | English |
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| Article number | 035426 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 80 |
| Issue number | 3 |
| DOIs | |
| State | Published - 6 Aug 2009 |