Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 45: Focus Session: Spins on Surfaces I (joint session O/MA)
MA 45.4: Vortrag
Donnerstag, 4. April 2019, 11:30–11:45, H15
Scanning tunneling spectroscopy of Co atoms at long Cu chains — Neda Noei1, •Alexander Weismann1, Roberto Mozara2, Oleg Kristanovski2, Alexander I. Lichtenstein2, and Richard Berndt1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany — 2Institut für Theoretische Physik, Universität Hamburg, D-20355 Hamburg, Germany
The interaction of an impurity atom carrying a localized spin with a host metal often leads to the many-body Kondo effect. We prepared atomic chains with lengths of hundreds of Cu atoms on a Cu(111) surface, and spectroscopically probed the Kondo resonance of Co adatoms on pristine terraces, at such chains, and at the end of chains. Distinctly different amplitudes, widths and spectroscopic line shapes are observed for the three cases and they are qualtatively reproduced by multi-orbital many body calculations that combine DFT with continuous-time quantum Monte Carlo.