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Electronic correlations in the van der Waals ferromagnet Fe₃GeTe₂revealedby its charge dynamics

Corasaniti, M.; Yang, R.; Sen, K.; Willa, K.; Merz, M.; Haghighirad, A.A.; Le Tacon, M.; Degiorgi, L.

Abstract (englisch):
The layered van der Waals ferromagnetic Fe3GeTe2harbors an unconventional interplay between topologyand magnetism, leading to a large anomalous Hall conductivity at low temperatures. Here, we investigate thetemperature dependence of its charge dynamics and reveal that upon entering the ferromagnetic state atTC∼200 K and further lowering the temperature there is the onset of a gradual spectral weight reshuffling fromthe mid-infrared range towards far- as well as near-infrared frequencies. This twofold spectral weight transferindicates the important role of the Hund’s coupling as primary source for electronic correlations and signals anincoherent-coherent crossover at low temperatures. Our findings also convey the electronic environment, basedon nodal-line topological states, favoring the large anomalous Hall conductiv

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DOI: 10.1103/PhysRevB.102.161109
Zugehörige Institution(en) am KIT Institut für Quantenmaterialien und -technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 15.10.2020
Sprache Englisch
Identifikator ISSN: 0163-1829, 0556-2805, 1050-2947, 1094-1622, 1095-3795, 1098-0121, 1538-4446, 1538-4489, 1550-235X,
KITopen-ID: 1000124672
HGF-Programm 43.21.01 (POF III, LK 01)
Quantum Correlations in Condensed Matter
Erschienen in Physical review / B
Band 102
Heft 16
Seiten Article: 161109
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