Dresden 2026 – scientific programme

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MA: Fachverband Magnetismus

MA 38: Ultrafast Magnetization Effects II

MA 38.14: Talk

Wednesday, March 11, 2026, 18:30–18:45, POT/0361

Ultrafast spin and pure spin currents — •Deepika Gill, Sam Shallcross, and Sangeeta Sharma — Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, 12489, Berlin, Germany

Pure spin currents, the flow of spin in the absence of charge flow, represent a promising route toward energy efficient next-generation electronics [1]. Creating such currents often involves designed nano-structures, which can be challenging to create in experiment. Here, relying only on intrinsic material properties, we shift the design to the light pulse via two schemes: (1) via anti-symmetric laser pulses [2] and (2) via composite light pulses that generate pure spin current by tailoring spin density occupation in momentum space [3]. We provide realistic material examples including WSe2 and calculate the ultra-fast spin current response both via state-of-the-art time density function theory as well as Wannier parameterized tight-binding calculations.

[1] S Sharma et al. Nature Communications 15 (1), 7579 (2024)

[2] D Gill et al. Nanoletters 25 (25), 9913-9917 (2025)

[3] D Gill et al. npj 2D Materials and Applications 9 (1), 49 (2025)

Keywords: spin current; pure spin current; ultrafast spintronics; ultrafast laser; THz light