Dresden 2003 – wissenschaftliches Programm
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O: Oberflächenphysik
O 18: Rastersondentechniken II
O 18.1: Vortrag
Dienstag, 25. März 2003, 11:15–11:30, M\"UL/ELCH
Surface State versus Tip-Sample Distance in a Scanning Tunneling Microscope — •Laurent Limot1, Thomas Maroutian1, Peter Johansson2, and Richard Berndt1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany — 2Department of Natural Sciences, University of Örebro, S-70182, Örebro, Sweden
Scanning Tunneling Microscopy (STM) has revealed new and interesting aspects of surface states on noble metals, such as defect scattering, lateral confinement, surface state mediated interactions and the lifetime of these states. We report a quantitative low-temperature STM spectroscopy study on Ag(111) over a wide range of tunneling currents enabling us to probe the surface state of Ag(111) over an uprecedented range of tip-sample distances. The excellent agreement found with our one-dimensional potential model calculation allows a better understanding of the surface state wavefunction.