Surface-State Depopulation on Small Ag(111) Terraces
Abstract
The dependence of the local density of states near the Fermi energy EF on the width of terraces T is investigated by tunneling scanning spectroscopy on Ag(111) at 7K. With decreasing T, the electronic density in the occupied surface state shifts monotonically towards EF, leading to a depopulation at T=3.2 nm in quantitative agreement with a Fabry-Pérot model. Depopulation coincides with a switch from confinement by terrace modulation to step modulation.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 2002
- DOI:
- Bibcode:
- 2002PhRvL..89v6801M
- Keywords:
-
- 73.20.At;
- 68.37.Ef;
- Surface states band structure electron density of states;
- Scanning tunneling microscopy