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O: Fachverband Oberflächenphysik

O 23: Poster Session II: Topology and symmetry-protected materials

O 23.5: Poster

Monday, March 1, 2021, 13:30–15:30, P

Molecular beam epitaxy and spectroscopy on the antiferromagnetic topological insulator (MnBi₂Te₄)(Bi₂Te₃) — •Philipp Kagerer^1,2, Celso Fornari^1,2, Sebastian Buchberger^1,2, Sergio Luiz Morelhao³, Raphael Crespo Vidal^1,2, Abdul Tcakaev^4,2, Volodymyr Zabolotnyy^4,2, Eugen Weschke⁵, Vladimir Hinkov^4,2, Martin Kamp⁶, Bernd Büchner^2,7,8, Anna Isaeva^2,7,8, Hendrik Bentmann^1,2, and Friedrich Reinert^1,2 — ¹Exp. Physik VII, Uni Würzburg — ²Würzburg-Dresden Cluster of Excellence ct.qmat — ³Inst. de Fisica, Univ. de Sao Paulo — ⁴Exp. Physik IV, Uni Würzburg — ⁵HZB Berlin — ⁶Phys. Inst. and RCCM, Uni Würzburg — ⁷Leibnitz IFW Dresden — ⁸Inst. für Festk.- und Materialphysik, TU Dresden

With the discovery of MnBi₂Te₄ as the first antiferromagnetic topological insulator, the material systems has emerged as a candidate for applications in quantum technologies [1]. Presently, the interplay between magnetism and topology in this compound is not fully understood. We have established the MBE-growth of (MnBi₂Te₄)(Bi₂Te₃) heterostructures on BaF₂ as a basis for further research into the magnetic and electronic properties of these compounds [2]. MBE allows us to access and tailor various structural as well as electronic material properties and may give access to the underlying physics. We will present a study on the growth of the compound including an analysis of XRD patterns, as well as photoemission and XMCD/XLD results. [1] M.M. Otrokov et al., Nature 576, 416 (2019) [2] P. Kagerer et al., JAP 128, 135303 (2020)