Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.26: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster C

Studying the electronic band structure of the exfoliated two-dimensional antiferromagnet NiPS₃ via temperature dependent µ-ARPES — Benjamin Pestka¹, •Biplab Bhattacharyya¹, Jeff Strasdas¹, Miłosz Rybak², Adi Harchol³, Niklas Leuth¹, Honey Boban⁴, Vitaliy Feyer⁴, Iulia Cojocariu⁴, Daniel Baranowski⁴, Simone Mearini⁴, Lutz Waldecker¹, Bernd Beschoten¹, Christoph Stampfer¹, Marcus Liebmann¹, Lukasz Plucinski⁴, Efrat Lifshitz³, Magdalena Birowska⁵, and Markus Morgenstern¹ — ¹RWTH-Aachen University, Germany — ²Wrocław University of Science and Technology, Poland — ³Technion - Israel Institute of Technology, Haifa, Israel — ⁴Forschungszentrum Jülich, PGI-6, Germany — ⁵University of Warsaw, Poland

Two-dimensional (2D) anti-ferromagnetic (AFM) materials offer novel research directions due to the pronounced interaction of electronic, spin and lattice structure. Transition metal phosphorus trisulfides (TMPS₃) are a semiconducting class of 2D AFM materials with intra-layer AFM order. Till date, the role of the electronic band structure for AFM coupling in exfoliated thin flakes of TMPS₃ has often remained unexplored. Here, we present a comprehensive study of temperature dependent angle-resolved photoemission spectroscopy (ARPES) of the exfoliated few-layered NiPS₃ above and below the Néel temperature (T_N). We observe band spectra changes across T_N that are compared with density functional theory data to pinpoint their orbital character. The AFM transition in our exfoliated flakes has been verified by Raman spectroscopy.

Keywords: 2D antiferromagnet; Transition metal phosphorus trisulfides; ARPES; density functional theory; Raman spectroscopy