SKM 2023 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 11: Crystal Structure Defects / Real Structure / Microstructure
KFM 11.9: Vortrag
Donnerstag, 30. März 2023, 16:55–17:15, POT 51
Probing Centrosymmetricity of Emergent Materials by Convergent Beam Electron Diffraction — •S. Subakti1,2, Y. Wang3, A. Chakraborty4, A.K. Srivastava4, D. Wolf1, T. Doert3, M. Ruck3, S.S.P. Parkin4, B. Büchner1,2, and A. Lubk1 — 1Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, 01069 Dresden, Germany — 2Institut für Festkörperphysik, TU Dresden, D-01062 Dresden, Germany — 3Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany — 4Department for Nano-Systems from Ions, Spins, and Electrons (NISE), Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle(Saale), Germany
Many exotic physics present in materials, such as chiral magnetic textures, hinges on the (non)existence of centrosymmetry. Consequently unambigous structural determination beyond x-ray diffraction (XRD), which is to a certain extend blind to centrosymmetry, is indispensable. Here, we present structural investigation of two emergent quantum materials, namely Fe3GeTe2 and Rh2NiSb, by means of convergent beam electron diffraction (CBED). Analyzing the diffraction group symmetries of the CBED patterns in combination with extinction rules and results from XRD analysis, we conclude the space group of these materials. Importantly, both phases are non-centrosymmetric, suggesting possible presence of chiral magnetic textures and multiferroicity.