Regensburg 2025 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 29: Poster II
HL 29.18: Poster
Dienstag, 18. März 2025, 18:00–20:00, P1
Raman investigation of the 2D magnetic semiconductor MnPS3 — •Thomas Kliewer1, Pierre-Maurice Piel1, Zdeněk Sofer2, and Ursula Wurstbauer1 — 1Institute of Physics, University of Münster, Germany — 2Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Czech Republic
The van-der-Waals (vdW) material MnPS3 is a member of the group of metal phosphorus trichalcogenides (MPX3; X=S, Se) which experiences rising interest due to its rich physical, chemical and structural properties. MnPS3 is a 2D magnetic semiconductor with an electronic bandgap of 2,79 eV[1]. Below the Néel-Temperature of 78 K, it exhibits an antiferromagnetic order within the layers and a ferromagnetic coupling between adjacent layers[2]. These properties are interesting for fundamental studies on magnetism in the 2D limit, the investigation of coupling between spin, lattice and charge degrees of freedom and for possible applications in spintronics. MnPS3 flakes of various thicknesses have been studied by temperature dependent Raman spectroscopy to uncover the coupling of lattice and spin degree of freedom. The Raman-spectra of MnPS3 show several phonon modes in accordance with the crystal structure. The intensity of the modes varies with the thickness of the crystal. Besides the expected hardening of the modes, the temperature-dependent measurements imply possible influence of the magnetic ordering on the observed modes. [1] Grasso et al. Physical Review B 44.20 (1991), p. 11060 [2] Wildes et al. Journal of Physics: Condensed Matter 6.24 (1994), p. L335
Keywords: MnPS3; Raman; magnetic