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Confining barriers for surface state electrons tailored by monatomic Fe rows on vicinal Au111 surfaces
- Source :
- Physical review letters. 92(9)
- Publication Year :
- 2003
-
Abstract
- We fabricated monatomic Fe wires on vicinal Au(111) surfaces and found that decoration of step edges with Fe adatoms has a significant influence on the behavior of surface state electrons confined between regularly arranged steps. On a surface with Fe monatomic rows, angle-resolved photoemission spectra measured in the direction perpendicular to the steps shows parabolic dispersion, in contrast to one-dimensional quantum-well levels observed on a clean surface. Simple analysis using a one-dimensional Kronig-Penney model reveals potential barrier reduction from 20 to 4.6 eV A, suggesting an attractive nature of the Fe adatoms as scatterers.
Details
- ISSN :
- 00319007
- Volume :
- 92
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.doi.dedup.....35eacf2b4f084e092fffddfe3a920d1a