| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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De Visser, Anne
University of Amsterdam
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2023Controlling of Localization by Elemental-substitution Effect in Layered BiCh2-based Compounds LaO1-xFxBiS2-ySeycitations
- 2022Disorder-induced transition from type-I to type-II superconductivity in the Dirac semimetal PdTe2citations
- 2021Superconducting and structural properties of the type-I superconductor PdTe2 under high pressurecitations
- 2019Correlations between structural, magnetic and electronic transport properties of nano-sized (Sr,La)-(Fe,Mo) double perovskitescitations
- 2013Kondo hybridisation and the origin of metallic states at the (001) surface of SmB6citations
- 2012Superconductivity in non-centrosymmetric YPtBi under pressure.citations
- 2012Superconductivity in the doped topological insulator CuxBi2Se3 under high pressurecitations
- 2011Single-crystal study on the heavy-fermion antiferromagnet UZn12citations
- 2010Anomalous spin distribution in the superconducting ferromagnet UCoGe studied by polarized neutron diffractioncitations
- 2010Weak itinerant ferromagnetism in Heusler-type Fe2VAl0.95citations
- 2010The superconducting ferromagnet UCoGecitations
- 2008Evolution of ferromagnetic order in URhGe alloyed with Ru, Co and Sicitations
Places of action
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article
Kondo hybridisation and the origin of metallic states at the (001) surface of SmB6
Abstract
SmB6, a well-known Kondo insulator, has been proposed to be an ideal topological insulator with states of topological character located in a clean, bulk electronic gap, namely, the Kondo-hybridization gap. Since the Kondo gap arises from many-body electronic correlations, SmB6 would be placed at the head of a new material class: topological Kondo insulators. Here, for the first time, we show that the k-space characteristics of the Kondo-hybridization process is the key to unraveling the origin of the two types of metallic states experimentally observed by angle-resolved photoelectron spectroscopy (ARPES) in the electronic band structure of SmB6(001). One group of these states is essentially of bulk origin and cuts the Fermi level due to the position of the chemical potential 20 meV above the lowest-lying 5d-4f hybridization zone. The other metallic state is more enigmatic, being weak in intensity, but represents a good candidate for a topological surface state. However, before this claim can be substantiated by an unequivocal measurement of its massless dispersion relation, our data raise the bar in terms of the ARPES resolution required, as we show there to be a strong renormalization of the hybridization gaps by a factor 2-3 compared to theory, following from the knowledge of the true position of the chemical potential and a careful comparison with the predictions from recent local-density-approximation (LDA)+Gutzwiller calculations. All in all, these key pieces of evidence act as triangulation markers, providing a detailed description of the electronic landscape in SmB6 and pointing the way for future, ultrahigh-resolution ARPES experiments to achieve a direct measurement of the Dirac cones in the first topological Kondo insulator.