Abstract
A new chain structure of Au is found on stepped Si(111) which exhibits a -filled band and a pair of -filled bands with a combined filling of . Band dispersions and Fermi surfaces for Si(553)-Au are obtained by photoemission and compared to that of Si(557)-Au. The dimensionality of both systems is determined using a tight binding fit. The fractional band filling makes it possible to preserve metallicity in the presence of strong correlations.
- Received 29 October 2002
DOI:https://doi.org/10.1103/PhysRevLett.90.176805
©2003 American Physical Society