Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 56: Spin-Hall effects
MA 56.3: Vortrag
Freitag, 16. März 2018, 10:00–10:15, H 0112
Spin-charge conversion in PBTTT π-conjugated polymer — •Mohammad M. Qaid1, Olga Zadvorna2, Henning Sirringhaus2, and Georg Schmidt1 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle — 2Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
Spin pumping can be used to inject a pure spin current from a ferromagnet into a conducting non-magnet. By the inverse spin-Hall effect (ISHE) this spin current can be converted into a charge current, an effect also dubbed spin-charge conversion. We have investigated the ISHE in the π-conjugated polymer poly (2,5-bis (3-hexadecylthiophen-2-yl) thieno [3,2-b] thiophene) PBTTT doped with F4TCNQ. The material is deposited on a ferrimagnetic yttrium iron garnet (YIG) thin film. In ferromagnetic resonance a spin current is injected from the YIG into the PBTTT and the inverse spin-Hall effect can be measured in the organic semiconductor. We have investigated the ISHE for different PBTTT thicknesses and also for samples which were annealed in order to change the doping. In addition we have excluded the Nernst effect which can be induced by thermal gradients caused by the RF excitation.