Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 113: 2D materials beyond graphene: TMDCs, silicene and relatives V
O 113.1: Talk
Friday, March 16, 2018, 10:30–10:45, MA 043
Growth and electronic structure of Sb bilayers on Bi2Se3: a route to achieve buckled antimonene — •Sanjoy K. Mahatha1,2, Kris Holtgrewe3, Roberto Flammini4, Conor Hogan4, Marco Papagno5, Alessandro Barla1, Paolo Moras1, Polina M. Sheverdyaeva1, Stefano Colonna4, Fabio Ronci4, Simone Sanna3, Ziya S. Aliev6, Evgueni V. Chulkov7, and Carlo Carbone1 — 1CNR-ISM, I-34149 Trieste, Italy — 2Aarhus University, 8000 Aarhus C, Denmark — 3University of Giessen, Germany — 4CNR-ISM, I-00133 Roma, Italy — 5Universita della Calabria, 87036 Arcavacata di Rende (CS), Italy — 6Azerbaijan National Academy of Science, AZ1143 Baku, Azerbaijan — 7Donostia International Physics Center, Basque Country, Spain
Hetero-structures consisting of topological insulators and two-dimensional (2D) materials represent an interesting system, where interfacial phenomena play a crucial role, thus allowing for innovative applications. Here, we will give a detailed account of the electronic and atomic structure of Sb bilayers on the Bi2Se3 surface, which has been investigated using scanning tunneling microscopy (STM), angle-resolved photoemission spectroscopy (ARPES) and ab-initio calculations. Our STM results univocally prove the wetting structure of Sb on Bi2Se3 with buckled honeycomb structure. ARPES measurements and calculated band structures show that the hybridization of Sb states with the Bi2Se3 substrate plays an important role in determining the spin-pattern of the surface localized electronic states.