1. Magneto-Optical Detection of the Orbital Hall Effect in Chromium
- Author
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Lyalin, Igor, Alikhah, Sanaz, Berritta, Marco, Oppeneer, Peter M., and Kawakami, Roland K.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Condensed Matter - Materials Science - Abstract
The orbital Hall effect has been theoretically predicted but its direct observation is a challenge. Here, we report the magneto-optical detection of current-induced orbital accumulation at the surface of a light 3$d$ transition metal, Cr. The orbital polarization is in-plane, transverse to the current direction, and scales linearly with current density, consistent with the orbital Hall effect. Comparing the thickness-dependent magneto-optical measurements with $\textit{ab initio}$ calculations, we estimate an orbital diffusion length in Cr of $6.6\pm 0.6$ nm., Comment: 6 pages, 5 figures
- Published
- 2023
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