Regensburg 2025 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 25: Poster 2D Materials: Electronic Structure and Exitations (joint session O/HL)
HL 25.4: Poster
Tuesday, March 18, 2025, 13:30–15:30, P3
Magnetic properties of V-doped WSe2 — •Jules M. Knebusch1,2, Jana Kähler1,2, Matthias Kalläne1,2,3, Tim Riedel1,2, Florian K. Diekmann1,2, Adina Timm1,2, and Kai Rossnagel1,2,3 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany — 2Ruprecht Haensel Laboratory, Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany — 3Kiel Nano, Surface and Interface Science KiNSIS, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
Spintronics holds promise for highly efficient classical and quantum computing and is therefore considered a key technology for future innovation. Pristine tungsten diselenide (WSe2), known as a semiconductor with a two-dimensional hexagonal 2H structure, is expected to transform into a room-temperature dilute ferromagnetic semiconductor upon vanadium doping, making it a highly attractive candidate for spintronic applications. This assumption is supported by density functional theory calculations and scanning transmission electron microscopy studies, and RKKY interactions are predicted as the driving mechanism. The crystals investigated in this study were synthesized in-house employing the chemical vapor transport method. This process produced as-is vanadium-doped WSe2 crystals with approximately 2% of the tungsten atoms (presumably) substituted by vanadium. The results reported here were obtained using a Physical Property Measurement System (PPMS) in ACMS configuration and provide valuable insights into the magnetic characteristics of this doped material.
Keywords: TMDC; magnetic semiconductor