Direct X-Ray detection of the spin Hall effect in CuBi
The spin Hall effect and the inverse spin Hall effect are important spin-charge conversion mechanisms. The direct spin Hall effect induces a surface spin accumulation from a transverse charge current due to spin-orbit coupling even in nonmagnetic conductors. However, most detection schemes involve a...
| Authors: | ; ; ; ; ; ; ; ; ; ; ; |
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| Format: | Article |
| Publication date: | 2022 |
| Country: | España |
| Institution: | Universidad Autónoma de Madrid |
| Repository: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Language: | English |
| OAI Identifier: | oai:repositorio.uam.es:10486/706309 |
| Online Access: | http://hdl.handle.net/10486/706309 https://dx.doi.org/10.1103/PhysRevX.12.031032 |
| Access Level: | Open access |
| Keyword: | Binary Alloys Circular Dichroism Spectroscopy Copper Crystal Symmetry Dichroism Magnetic Moments X Ray Spectroscopy Física |
| Summary: | The spin Hall effect and the inverse spin Hall effect are important spin-charge conversion mechanisms. The direct spin Hall effect induces a surface spin accumulation from a transverse charge current due to spin-orbit coupling even in nonmagnetic conductors. However, most detection schemes involve additional interfaces, leading to large scattering in reported data. Here we perform interface-free x-ray spectroscopy measurements at the Cu L3,2 absorption edges of highly Bi-doped Cu (Cu95Bi5). The detected x-ray magnetic circular dichroism signal corresponds to an induced magnetic moment of (2.2 ± 0.5) × 10-12 μB A-1 cm2 per Cu atom averaged over the probing depth, which is of the same order of magnitude as found for Pt measured by magneto-optics. The results highlight the importance of interface-free measurements to assess material parameters and the potential of CuBi for spin-charge conversion applications |
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