Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 47: Poster III

MA 47.7: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster D

Giant current driven magnetic response in Ca₂RuO₄ — •Aditya Putatunda, Ravi Kaushik, and Sergey Artyukhin — Istituto Italiano di Tecnologia, Genova, Italy 16163

Current driven manipulation of spin states in magnetic systems, mediated via spin-orbit torque has attracted significant attention in recent times due to its performance potential for high speed, low power switching in the form of novel devices1. The ability to realize this functionality in antiferromagnetic systems offer the extra advantage of insensitivity to magnetic field perturbations, while being readily compatible with metal, semiconductor, or materials with an insulating electronic structure2.

Here we report our theoretical investigation on Ca2RuO4, an antiferromagnetic insulator, driven by strong 4d spin-orbit interactions, exploring the recently observed Raman spectra measurements. Driven by a miniscule current, prior to the onset of its conductivity transition, this material shows significant alteration to its low energy spectra, apparently due to a spin-flop transition. We will be discussing our analytical model, supported by first-principles calculations offering an explanation to this novel observation3.

1 Soumyanarayanan et al., Nature 539, 509517 (2016) 2 Železný et al., Phys. Rev. Lett. 113, 157201 (2014) 3 Kunkemöller et al., Phys. Rev. B 95, 214408 (2017)

Keywords: Spin transfer torque; Spin flop transition