title: Confining barriers for surface state electrons tailored by monatomic Fe rows on vicinal Au111 surfaces.
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.
authors.affiliation: RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Shiraki
authors.forename: Hideki
authors.initials: H
authors.lastname: Fujisawa
authors.forename: Masashi
authors.initials: M
authors.lastname: Nantoh
authors.forename: Maki
authors.initials: M
authors.lastname: Kawai