Spinodal Superlattices of Topological Insulators

Published

Journal Article

© 2018 American Chemical Society. Spinodal decomposition is proposed for stabilizing self-assembled interfaces between topological insulators (TIs) by combining layers of iso-structural and iso-valent TlBiX2(X = S, Se, Te) materials. The composition range for gapless states is addressed concurrently to the study of thermodynamically driven boundaries. By tailoring composition, the TlBiS2-TlBiTe2system might produce both spinodal superlattices and two-dimensional eutectic microstructures, either concurrently or separately. The dimensions and topological nature of the metallic channels are determined by following the spatial distribution of the charge density and the spin-texture. The results validate the proof of concept for obtaining spontaneously forming two-dimensional TI-conducting channels embedded into three-dimensional insulating environments without any vacuum interfaces. Since spinodal decomposition is a controllable kinetic phenomenon, its leverage could become the long-sought enabler for effective TI technological deployment.

Full Text

Duke Authors

Cited Authors

  • Usanmaz, D; Nath, P; Toher, C; Plata, JJ; Friedrich, R; Fornari, M; Buongiorno Nardelli, M; Curtarolo, S

Published Date

  • April 10, 2018

Published In

Volume / Issue

  • 30 / 7

Start / End Page

  • 2331 - 2340

Electronic International Standard Serial Number (EISSN)

  • 1520-5002

International Standard Serial Number (ISSN)

  • 0897-4756

Digital Object Identifier (DOI)

  • 10.1021/acs.chemmater.7b05299

Citation Source

  • Scopus