Near-Surface Buckling in Strained Metal Overlayer Systems
- Sandia National Laboratories, Livermore, California 94550 (United States)
Scanning tunneling microscopy (STM) images of Ag films grown on Ru(0001) reveal a periodic unit cell with a structural transformation at silver coverages slightly less than one monolayer. Dislocations in the overlayers are similar to the Au(111) herringbone structure; however, Ag/Ru(0001) exhibits two novel differences from previously observed herringbone structures. First, the unit cell dimensions change dramatically as a function of coverage. Second, STM images of Ag/Ru(0001) are inverted relative to those for Au(111). We show that this image inversion is due to substantial relaxations perpendicular to the surface resulting from local strains in the silver overlayer. {copyright} {ital 1995} {ital The} {ital American} {ital Physical} {ital Society}.
- Research Organization:
- Sandia National Laboratory
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 147892
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 75; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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