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TT: Fachverband Tiefe Temperaturen

TT 88: Spin Transport and Orbitronics, Spin-Hall Effects II (joint session MA/TT)

TT 88.5: Vortrag

Donnerstag, 12. März 2026, 16:00–16:15, POT/0361

Inherent Electro-Optic Kerr Rotation — •Erlend Syljuåsen¹, Alireza Qaiumzadeh¹, Rembert Duine^2,3, and Arne Brataas¹ — ¹Center for Quantum Spintronics,Trondheim, Norway — ²Institute for Theoretical Physics, Utrecht University, The Netherlands — ³Department of Applied Physics, Eindhoven University of Technology, The Netherlands

Static electric-field–induced Kerr rotation of reflected light is used to probe symmetry breaking, electronic properties, and transport phenomena as the spin and orbital Hall effects. In this talk, we uncover a previously overlooked contribution to the electric-field–induced Kerr rotation, arising from the interplay of matter, the static electric field, and the magnetic component of light. This contribution remains nonzero even in isotropic nonmagnetic homogeneous materials, making this effect inherent to any such Kerr measurement. We present analytical expressions for both two-dimensional layers and semi-infinite bulk metals, and find within the relaxation-time approximation signal magnitudes directly relevant for experiments.

Keywords: Electro-optic effects; Magneto-optical Kerr effect; Transport phenomena