The modification of the surface electronic structure by an adsorbate is measured quantitatively with scanning tunneling microscopy and spectroscopy for the first time. The standing wave of the Cu surface-state electrons is utilized to probe the subtle change in the electronic structure on the Xe-covered Cu(111). The observed Fermi wavelength on the Xe-covered surface is longer by 15% than on the bare Cu surface. The change upon Xe adsorption is explained with the observed modified dispersion of the Cu surface state; upward shift by (130±20) meV with almost same effective mass.
|Physical Review B - Condensed Matter and Materials Physics
|Published - 2000 Dec 15
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics