Interplay between the Kondo effect and the Ruderman-Kittel-Kasuya-Yosida interaction
2014 | journal article. A publication with affiliation to the University of Göttingen.
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Interplay between the Kondo effect and the Ruderman-Kittel-Kasuya-Yosida interaction
Prueser, H.; Dargel, P. E.; Bouhassoune, M.; Ulbrich, R. G.; Pruschke, T.; Lounis, S. & Wenderoth, M. (2014)
Nature Communications, 5 art. 5417. DOI: https://doi.org/10.1038/ncomms6417
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- Authors
- Prueser, Henning; Dargel, Piet E.; Bouhassoune, Mohammed; Ulbrich, Rainer G.; Pruschke, Thomas; Lounis, Samir; Wenderoth, Martin
- Abstract
- The interplay between the Ruderman-Kittel-Kasuya-Yosida interaction and the Kondo effect is expected to provide the driving force for the emergence of many phenomena in strongly correlated electron materials. Two magnetic impurities in a metal are the smallest possible system containing all these ingredients and define a bottom-up approach towards a long-term understanding of concentrated/dense systems. Here we report on the experimental and theoretical investigation of iron dimers buried below a Cu(100) surface by means of low-temperature scanning tunnelling spectroscopy combined with density functional theory and numerical renormalization group calculations. The Kondo effect, in particular the width of the Abrikosov-Suhl resonance, is strongly altered or even suppressed due to magnetic coupling between the impurities. It oscillates as a function of dimer separation revealing that it is related to indirect exchange interactions mediated by the conduction electrons.
- Issue Date
- 2014
- Status
- published
- Publisher
- Nature Publishing Group
- Journal
- Nature Communications
- ISSN
- 2041-1723