Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 29: Topology- and Symmetry-Protected Materials
O 29.5: Vortrag
Dienstag, 8. März 2016, 11:45–12:00, S051
Controlling the spin-texture of topological insulators with organic molecules — Sebastian Jakobs1,2, Benjamin Stadtmüller1, •Dominik Jungkenn1, Martin Laux1, Johannes Stöckl1, Martin Aeschlimann1, Stefan Mathias3, and Mirko Cinchetti1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Str 46, 67663 Kaiserslautern, Germany — 2Graduate School of Excellence Materials Science in Mainz, Erwin Schroedinger Straße 46, 67663 Kaiserslautern, Germany — 3I. Physikalisches Institut, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
We present a rational design approach to customize the spin texture of surface states of a topological insulator (TI). This approach relies on the extreme multifunctionality of organic molecules that are used to functionalize the surface of the prototypical TI Bi2Se3. For the rational design we use theoretical calculations to guide the choice and chemical synthesis of appropriate molecules that customize the spin texture of Bi2Se3. The theoretical predictions are then verified in angular-resolved photoemission experiments. We show that the surface can be passivated while the Dirac cone can be shifted at will by tuning the strength of the molecule-TI interaction and Rashba-split quantum-well interface states can be created. These tailored interface properties - passivation, spin-texture tuning and creation of hybrid interface states - open a wide field of opportunities for interface assisted molecular spintronics in spin-textured materials.