Statistical modeling of epitaxial thin films of an intrinsic antiferromagnetic topological insulator

Autor(es)

Penacchio, Rafaela F. S. ; Fornari, Celso, I ; Camillo, Yori G. ; Kagerer, Philipp ; Buchberger, Sebastian ; Kamp, Martin ; Bentmann, Hendrik ; Reinert, Friedrich ; Morelhao, Sergio L.

• Tipo de documento: Artigo Científico
• Fonte: Thin Solid Films; v. 750, p. 13-pg., 2022-05-31.

Resumo

Synthesis of materials demands structural analysis tools suited to the particularities of each system. Van der Waals (vdW) materials are fundamental in emerging technologies of spintronics and quantum information processing. In particular, topological insulators and, more recently, materials that allow the phenomenological exploration of the combination of non-trivial electronic band topology and magnetism. Weak vdW forces between atomic layers give rise to compositional fluctuations and structural disorder that are difficult to control, even in a typical topological insulator such as the binary compound Bi2Te3. The addition of a third element, as in MnBi2Te4, makes the epitaxy of these materials even more chaotic. In this work, statistical modeling of MnxBi2Te3+x film structures is described. It allows the simulation of X-ray diffraction in disordered MnBi2Te4/ Bi2Te3 heterostructures, a necessary step towards controlling the epitaxial growth of topological insulators with intrinsic magnetic properties. On top of this, the diffraction simulation method used here can be readily applied as a general tool in the field of materials design based on stacking of vdW bonded layers of distinct elements. (AU)

• Processo FAPESP: 19/01946-1 - Difração e espalhamento de raios-X no estudo de materiais: metodologias avançadas II
• Beneficiário: Sérgio Luiz Morelhão
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 21/01004-6 - Difração dinâmica de raios X com fontes avançadas de radiação síncrotron: metodologias para aplicações em sistemas biológicos e materiais tecnológicos
• Beneficiário: Rafaela Felix da Silva Penacchio
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto