Abstract
A topological insulator is a state of quantum matter that, while being an insulator in the bulk, hosts metallic topologically protected electronic states at the surface. These states open the way for realizing a number of new applications in spintronics and quantum computing. In order to take advantage of their unique properties, topological insulators should be tuned in such a way that isolated Dirac cones are located within the topological transport regime, without any scattering channels.
This chapter is devoted to natural topological heterostructures composed of different sublattices, at least one of which is a topological insulator. We demonstrate that these systems show diverse electronic properties and, depending on the structure and composition, can be topological insulators supporting Dirac surface states whose dispersion essentially depends on the surface termination, topological Weyl semimetals, or trivial band insulators.
The chapter is organized in five sections. Section 15.1 provides computational details. In Sect. 15.2, we discuss the crystal structure and electronic states in the (CIVBVI)n=1(A V2 B VI3 )m>1 superlattices. Section 15.3 is devoted to the peculiarities of the topologically protected electronic states in the (CIVBVI)n>1(A V2 B VI3 )m=1 compounds. Temperature-driven topological phase transitions in the Ge2Sb2Te5 phase-change materials are addressed in Sect. 15.4. Finally, we end with a summary and conclusions in Sect. 15.5.
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Eremeev, S.V., Rusinov, I.P., Chulkov, E.V. (2020). Natural Topological Insulator Heterostructures. In: Rocca, M., Rahman, T.S., Vattuone, L. (eds) Springer Handbook of Surface Science. Springer Handbooks. Springer, Cham. https://doi.org/10.1007/978-3-030-46906-1_15
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