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4 October 2022 Epitaxial MnSb2Te4: an intrinsic magnetic topological insulator with high Curie temperature (Conference Presentation)
Oliver Rader
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Proceedings Volume PC12205, Spintronics XV; PC122050J (2022) https://doi.org/10.1117/12.2635944
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
Magnetically doped topological insulators enable the quantum anomalous Hall effect. Stoichiometric systems of AB2C4 stoichiometry are considered promising but MnBi2Te4 is antiferromagnetic. MnSb2Te4 has been predicted to be antiferromagnetic as well and topologically trivial but we show that spin- and angle-resolved photoemission reveal a clear Dirac cone as sign of a topological insulator. Moreover, it is ferromagnetic with a high Curie temperature of up to 50 K, i. e., two times larger than the Néel temperature of the related MnBi2Te4. The reason for these properties is found in a 5% excess Mn as detailed calculations show.
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Oliver Rader "Epitaxial MnSb2Te4: an intrinsic magnetic topological insulator with high Curie temperature (Conference Presentation)", Proc. SPIE PC12205, Spintronics XV, PC122050J (4 October 2022); https://doi.org/10.1117/12.2635944
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KEYWORDS
Magnetism
Manganese
Bismuth
Crystals
Ferromagnetics
Metrology
Quantum communications
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