Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 39: Poster Magnetism II
MA 39.3: Poster
Mittwoch, 11. März 2026, 18:00–21:00, P2
Tuning Spin-Charge Conversion at the hybrid heavy-metal/ organic semiconductor interface via Doping — Parul Devi1, •Devamrutha I S1, Zhitian Ling2, Ashish Moharana1, David Anthofer1, Tomasz Marszalek2, and Angela Wittmann1 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, Deutschland — 2Max-Planck-Institut für Polymerforschung, Mainz, Deutschland
Spintronics, the way forward to device miniaturization, leverages electron spin rather than charge. Though inorganic materials were predominantly given more attention in spin transport studies, organic semiconductor (OSC)/magnetic hybrid interfaces are quickly gaining interest, owing to the flexibility, scalability, and structural tunability of organic materials. Here, we probe the role of the charge carrier concentration of the OSC on the spin injection and spin-charge conversion efficiency in hybrid heterostructures via spin pumping. For this, we probe the inverse spin Hall effect (ISHE) in a ferrimagnetic insulator/ heavy-metal/ OSC heterostructure and systematically dope the conjugated polymer PBTTT with F4-TCNQ. We observed that the ISHE amplitude in the heavy metal increases by a factor of 4 upon adsorption of the PBTTT layer while doping reduces the signal. These results open the door to charge doping as an effective tool to control spin injection across hybrid interfaces.
Keywords: Ferromagnetic resonance; Spin injection; Inverse spin hall effect; Organic semiconductor; Hybrid interfaces