The morphology of Cu clusters on SrTiO{sub 3}(001) at initial stages of metal film growth
- Pacific Northwest Lab., Richland, WA (United States). Environmental Molecular Sciences Lab.
- Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering
Copper overlayers deposited on nearly stoichiometric SrTiO{sub 3}(001) have been investigated with scanning tunneling microscopy (STM). Vapor deposition of Cu on a SrTiO{sub 3}(001) surface at ambient temperature leads to the formation of three dimensional islands (clusters). The distribution of Cu islands appears to be inhomogeneous with two characteristic morphologies. In regions with a low density of Cu island the Cu was always associated with step edges or defect sites. In regions with a high density of Cu islands the islands exhibit a random but nearly close packed morphology. The variation of Cu island density is indicative of diffusion of Cu clusters on the SrTiO{sub 3}(001) surface. Diffusion was further confirmed by annealing the Cu/SrTiO{sub 3} at elevated temperatures yielding agglomeration of Cu clusters.
- OSTI ID:
- 94029
- Report Number(s):
- CONF-941144--; ISBN 1-55899-258-8
- Country of Publication:
- United States
- Language:
- English
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