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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 Kagerer1,2, Celso Fornari1,2, Sebastian Buchberger1,2, Sergio Luiz Morelhao3, Raphael Crespo Vidal1,2, Abdul Tcakaev4,2, Volodymyr Zabolotnyy4,2, Eugen Weschke5, Vladimir Hinkov4,2, Martin Kamp6, Bernd Büchner2,7,8, Anna Isaeva2,7,8, Hendrik Bentmann1,2, and Friedrich Reinert1,21Exp. 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)

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