1. Molecular beam epitaxy of antiferromagnetic (MnBi2Te4)(Bi2Te3) thin films on BaF2 (111).
- Author
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Kagerer, P., Fornari, C. I., Buchberger, S., Morelhão, S. L., Vidal, R. C., Tcakaev, A., Zabolotnyy, V., Weschke, E., Hinkov, V., Kamp, M., Büchner, B., Isaeva, A., Bentmann, H., and Reinert, F.
- Subjects
BARIUM fluoride ,MOLECULAR beam epitaxy ,THIN films ,MAGNETIC circular dichroism ,SCANNING transmission electron microscopy ,EPITAXY ,MAGNETIC insulators - Abstract
The layered van der Waals compounds ( MnBi 2 Te 4)( Bi 2 Te 3) were recently established as the first intrinsic magnetic topological insulators. We report a study on the epitaxial growth of (MnBi 2 Te 4) m (Bi 2 Te 3) n films based on the co-deposition of MnTe and Bi 2 Te 3 on BaF 2 (111) substrates. X-ray diffraction and scanning transmission electron microscopy evidence the formation of multilayers of stacked MnBi 2 Te 4 septuple layers and Bi 2 Te 3 quintuple layers with a predominance of MnBi 2 Te 4. The elemental composition and morphology of the films is further characterized by x-ray photoemission spectroscopy and atomic force microscopy. X-ray magnetic circular and linear dichroism spectra are comparable to those obtained for MnBi 2 Te 4 single crystals and confirm antiferromagnetic order in the films. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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