Conductance and Kondo effect in a controlled single-atom contact |
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Authors: | Néel N Kröger J Limot L Palotas K Hofer W A Berndt R |
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Institution: | Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universit?t zu Kiel, D-24098 Kiel, Germany. |
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Abstract: | The tip of a low-temperature scanning tunneling microscope is brought into contact with individual cobalt atoms adsorbed on Cu(100). A smooth transition from the tunneling regime to contact occurs at a conductance of G approximately G0. Spectroscopy in the contact regime, i.e., at currents in a muA range, was achieved and indicated a significant change of the Kondo temperature TK. Calculations indicate that the proximity of the tip shifts the cobalt d band and thus affects TK. |
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