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Electronic correlations in the van der Waals ferromagnet Fe₃ GeTe₂ revealed by 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 $Fe_{3} GeTe_{2}$ harbors 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 at $T_{C}∼200$ K and further lowering the temperature there is the onset of a gradual spectral weight reshuffling from the 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 conductivity.

DOI: 10.1103/PhysRevB.102.161109
Zitationen: 6
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
Verlag American Physical Society (APS)
Band 102
Heft 16
Seiten Art.-Nr.: 161109
Schlagwörter KNMF 2019-022-025949 WERA, KNMF 2020-024-029049 WERA
Nachgewiesen in Dimensions
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