Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 12: Terahertz Spintronics
MA 12.4: Talk
Monday, March 9, 2026, 15:45–16:00, POT/0351
THz light field driven unidirectional spin Hall magnetoresistance in magnetic heterostructures — •Sergey Kovalev1, Ruslan Salikhov2, Igor Ilyakov2, Anneke Reinold1, Jan Deinert2, Thales Oliveira2, Alexey Ponomaryov2, Gulloo Prajapati2, Patrick Pilch1, Ahmed Ghalgaoui1, Steffen Kober1, Jürgen Fassbender2, Jürgen Lindner2, and Zhe Wang1 — 1Technische Universität Dortmund, Dortmund, Germany — 2Helmholtz Zentrum Dresden Rossendorf, Dresden, Germany
We demonstrate unidirectional spin Hall magnetoresistance (USMR) in magnetic heterostructures driven by terahertz (THz) light electric fields [1]. To isolate USMR from other spin transport phenomena, we performed anisotropy characterization of spintronic THz second-harmonic generation as a function of sample magnetization and THz pump polarization states. By investigating the temperature dependence of THz-driven USMR, we reveal distinct contributions to USMR dynamics on picosecond time scales. Our approach enables the characterization of ultrafast, field-driven spin-related magnetoresistance in free-standing heterostructures without the need for lithographic processing.
[1] R. Salikhov et al., "Ultrafast unidirectional spin Hall magnetoresistance driven by terahertz light field." Nat Commun 16, 2249 (2025)
Keywords: Spin Hall magnetoresistance; spin transport; Terahertz harmonic generation