Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Poster Session II

MA 48.70: Poster

Donnerstag, 10. März 2016, 15:00–18:00, Poster B1

Spin textures in 3D topological insulator thin films probed with iron-oxide based spin detector — •Lukasz Plucinski1, Markus Eschbach1, Ewa Mlynczak1, Pika Gospodaric1, Mathias Gehlmann1, Sven Döring1, Gustav Bihlmayer2, Gregor Mussler3, Detlev Grützmacher3, Stefan Blügel2, and Claus M. Schneider11PGI-6, FZ Jülich — 2PGI-1 and IAS-1, FZ Jülich — 3PGI-9, FZ Jülich

We will present high resolution spin- and angle-resolved photoemission data of the spin-texture of 3D topological insulator thin films (Bi2Te3, Sb2Te3, Bi2Se3). Spectra were measured using the combination of a hemispherical electron energy analyzer (MBS A1) with an iron-oxide based spin detector (Focus Gmbh Ferrum) which allows measuring one of the in-plane and the out-of-plane spin component of the sample.

We will present new data obtained using He discharge lamp (21.22 eV), Xe microwave source (8.4 eV), and 6 eV laser-based source. We will compare new spectra, taken at an energy resolution down to approx. 30 meV, with our previously published data [1, 2] measured using SPLEED spin detector, where the resolution was 150 meV.

[1] L. Plucinski et al., J. Appl. Phys. 113, 053706 (2013) [2] A. Herdt et al., Phys. Rev. B 87, 035127 (2013).

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