Year: 2020
Type: article
Abstract: Topological surface states usually emerge at the boundary between a topological and a conventional insulator. Their precise physical character and spatial localization depend on the complex interplay between the chemical, structural and electronic properties of the two insulators in contact. Using a lattice-matched heterointerface of single and double bilayers of β-antimonene and bismuth selenide, we perform a comprehensive experimental and theoretical study of the chiral surface states by means of microscopy and spectroscopic measurements complemented by first-principles calculations. We demonstrate that, although β-antimonene is a trivial insulator in its free-standing form, it inherits the unique symmetry-protected spin texture from the substrate via a proximity effect that induces outward migration of the topological state. This "topologization" of β-antimonene is found to be driven by the hybridization of the bands from either side of the interface.
Source: Scientific Reports
Institutions: Justus-Liebig-Universität Gießen, Deutsches Elektronen-Synchrotron DESY, Institute of Structure of Matter, National Research Council, University of Calabria, Elettra-Sincrotrone Trieste S.C.p.A., Azerbaijan State Oil and Industry University, Azerbaijan National Academy of Sciences, Institute of Catalysis and Inorganic Chemistry, Institute of Strength Physics and Materials Science, Russian Academy of Sciences, University of the Basque Country, St Petersburg University, Donostia International Physics Center
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,693
Award: G6194279217
OpenAlex ID: W3081544641