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Appl. Phys. A 72 (2001) pp. S147-S148

Electronic structure of an adsorbate in a resonator

J. Kliewer and R. Berndt

2. Physikalisches Institut, RWTH Aachen, D-52056 Aachen, Germany
and
Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany

S. Crampin

Department of Physics, University of Bath, BA2 7AY, United Kingdom

Abstract
We report the controlled modification of the electronic structure on a single Mn adsorbate. This modification was achieved by placing the Mn atom within geometrical arrays of adatoms on Ag(111), and observed with local tunnelling spectroscopy. The changes result from the coupling between the Mn $s$ level and surface electronic states of the substrate, which are strongly influenced by the size and geometry of the nanocavity. The dimension and geometry of the adatom array thus provide a degree of control over the induced changes.