Dresden 2017 – scientific programme
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O: Fachverband Oberflächenphysik
O 56: 2D Materials beyond Graphene
O 56.8: Poster
Tuesday, March 21, 2017, 18:30–20:30, P2-EG
Electronic Structure of surface-doped FeTe bulk crystals and epitaxial FeTe thin films on Bi2Te3 — •Fabian Arnold1, Jonas Warmuth2, Jan Fikáček3, Matteo Michiardi1, Marco Bianchi1, Jan Honolka3, Tim Wehling4, Philip Hofmann1, and Jens Wiebe2 — 1Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark — 2Department of Physics, Hamburg University, Hamburg, Germany — 3Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic — 4Institut für Theoretische Physik, Universität Bremen, Bremen, Germany
The realization of unconventional superconductivity in iron-based superconductors (SCs) has attracted growing attention in the physics community in the recent years, especially after the discovery of high temperature superconductivity in systems involving thin layers. Iron-chalcogenides have the simplest crystal structure in this materials class which turns them into good candidates for fundamental studies of the electronic structure and its relation to the superconductivity. It is especially interesting that for strongly correlated high-Tc SC materials like Fe-based SCs, a transition to the SC phase upon chemical doping is observable. Here we present an angle-resolved photoemission spectroscopy study of bulk FeTe and thin films of FeTe grown on the topological insulator Bi2Te3 [1,2], surface-doped with alkali atoms, and compare to ab-initio calculations. Interestingly, there is almost no change in the electronic structure upon surface doping. [1] S. Manna et al., arXiv:1606.03249 (2016), Nat. Commun. (in press). [2] T. Hänke et al., arXiv:1606.09192 (2016), Nat. Commun. (in press).