title: Imaging of electron potential landscapes on Au(111).
abstract: The Hohenberg-Kohn theorem states that the ground state electron density completely determines the external potential acting on an electron system. Inspired by this fundamental theorem, we developed a novel approach to map directly the electron potential in surface systems: linear response theory applied to the total electron density as measured with scanning tunneling microscopy determines the external potential. Potential imaging is demonstrated for the s-p derived surface state on Au(111), where the "herringbone" reconstruction induces a periodic potential modulation, the details of which are revealed by our technique.
authors.affiliation: Institut de Physique des Nanostructures, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
authors.forename: L
authors.initials: L
authors.lastname: Bürgi
authors.forename: H
authors.initials: H
authors.lastname: Brune
authors.forename: K
authors.initials: K
authors.lastname: Kern