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001018238 1001_ $$0P:(DE-HGF)0$$aFriedrich, Felix$$b0
001018238 245__ $$aEvidence for spinarons in Co adatoms
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001018238 520__ $$aCobalt atoms on the (111) surfaces of noble metals are considered to be prototypical systems for the Kondo effect in scanning tunnelling microscopy experiments. Recent first-principles calculations, however, suggest that the experimentally observed spectroscopic zero-bias anomaly can be interpreted in terms of excitations of the spin of the Co atom and the formation of a novel many-body state, namely, the spinaron, rather than from a Kondo resonance. The spinaron is a magnetic polaron that results from the interaction of spin excitations with conduction electrons. However, the experimental confirmation for the existence of spinarons remains elusive. Here we present experimental evidence for spinaronic states in Co atoms on the Cu(111) surface. Our spin-averaged and spin-polarized scanning tunnelling spectroscopy measurements in high magnetic fields allow us to discriminate between the different existing theoretical models and to invalidate the prevailing Kondo-based interpretation of the zero-bias anomaly. Our extended ab initio calculations instead suggest the presence of multiple spinaronic states. Thus, our work provides the foundation to explore the characteristics and consequences of these intriguing hybrid many-body states as well as their design in artificial nanostructures.
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001018238 536__ $$0G:(EU-Grant)856538$$a3D MAGiC - Three-dimensional magnetization textures: Discovery and control on the nanoscale (856538)$$c856538$$fERC-2019-SyG$$x1
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001018238 7001_ $$0P:(DE-HGF)0$$aOdobesko, Artem$$b1$$eCorresponding author
001018238 7001_ $$0P:(DE-Juel1)157840$$aBouaziz, Juba$$b2
001018238 7001_ $$0P:(DE-Juel1)130805$$aLounis, Samir$$b3$$eCorresponding author$$ufzj
001018238 7001_ $$0P:(DE-HGF)0$$aBode, Matthias$$b4
001018238 773__ $$0PERI:(DE-600)2206346-8$$a10.1038/s41567-023-02262-6$$p28-33$$tNature physics$$v20$$x1745-2473$$y2024
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001018238 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a Wilhelm Conrad Röntgen-Center for Complex Material Systems (RCCM), Julius-Maximilians-Universität Würzburg, Würzburg, Germany$$b0
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001018238 9101_ $$0I:(DE-HGF)0$$6P:(DE-Juel1)130805$$a Faculty of Physics, University of Duisburg-Essen and CENIDE, Duisburg, Germany$$b3
001018238 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$aWilhelm Conrad Röntgen-Center for Complex Material Systems (RCCM), Julius-Maximilians-Universität Würzburg, Würzburg, Germany$$b4
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