Journal Article

FZJ-2015-02928

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interplay between the Kondo effect and the Ruderman–Kittel–Kasuya–Yosida interaction

Prüser, H. ; Dargel, P. E. ; Bouhassoune, M.FZJ* ; Ulbrich, R. G. ; Pruschke, T. ; Lounis, S.FZJ* ; Wenderoth, M. (Corresponding Author)

2014
Nature Publishing Group London

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Please use a persistent id in citations: http://hdl.handle.net/2128/24459  doi:10.1038/ncomms6417

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.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 422 - Spin-based and quantum information (POF2-422) (POF2-422)

Appears in the scientific report 2014

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Database coverage:
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