Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 51: Poster: Electronic Structure of Surfaces: Spectroscopy, Surface States
O 51.12: Poster
Tuesday, March 13, 2018, 18:15–20:30, Poster B
Electronic states on metal/topological insulator heterostructure — •Garima Saraswat, Jan Homberg, Alexander Weismann, and Richard Berndt — Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany
Topological insulators (TI) are of great interest due to their unusual surface states. Exotic properties such as p-wave-like superconductivity and gapped Dirac states have been predicted for proximity coupled superconductor/TI and ferromagnet/TI structures respectively [1]. Normal metal/TI junctions which could be very relevant for device fabrication remain relatively unexplored. In this work we perform scanning tunneling spectroscopy (STS) on few monolayers of Pb deposited on Sb2Te3 single crystal surface. We observe a change in the Fermi level as a function of Pb coverage on the surface. Pb nanoislands exhibit quantum well states. The effect of topological surface states on these QW states will be discussed.
[1 ] M. Z. Hasan and C. L. Kane, Rev. Mod. Phys. 82, 3045 (2010)