Negative orbital Hall effect in Germanium
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arXiv
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| Hauptverfasser: | , , , , , |
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| Format: | Preprint |
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2024
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| author | Santos, E. Abrao, J. E. Costa, J. L. Santos, J. G. S. Mendes, J. B. S. Azevedo, A. |
| author_facet | Santos, E. Abrao, J. E. Costa, J. L. Santos, J. G. S. Mendes, J. B. S. Azevedo, A. |
| contents | Our investigation reveals a groundbreaking discovery of a negative inverse orbital Hall effect (IOHE) in Ge thin films. We employed the innovative orbital pumping technique where spin-orbital coupled current is injected into Ge films using YIG/Pt(2)/Ge($t_{Ge}$) and YIG/W(2)/Ge($t_{Ge}$) heterostructures. Through comprehensive analysis, we observe significant reductions in the signals generated by coherent (RF-driven) and incoherent (thermal-driven) spin-orbital pumping techniques. These reductions are attributed to the presence of a remarkable strong negative IOHE in Ge, showing its magnitude comparable to the spin-to-charge signal in Pt. Our findings reveal that although the spin-to-charge conversion in Ge is negligible, the orbital-to-charge conversion exhibits large magnitude. Our results are innovative and pioneering in the investigation of negative IOHE by the injection of spin-orbital currents. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_07254 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Negative orbital Hall effect in Germanium Santos, E. Abrao, J. E. Costa, J. L. Santos, J. G. S. Mendes, J. B. S. Azevedo, A. Mesoscale and Nanoscale Physics Our investigation reveals a groundbreaking discovery of a negative inverse orbital Hall effect (IOHE) in Ge thin films. We employed the innovative orbital pumping technique where spin-orbital coupled current is injected into Ge films using YIG/Pt(2)/Ge($t_{Ge}$) and YIG/W(2)/Ge($t_{Ge}$) heterostructures. Through comprehensive analysis, we observe significant reductions in the signals generated by coherent (RF-driven) and incoherent (thermal-driven) spin-orbital pumping techniques. These reductions are attributed to the presence of a remarkable strong negative IOHE in Ge, showing its magnitude comparable to the spin-to-charge signal in Pt. Our findings reveal that although the spin-to-charge conversion in Ge is negligible, the orbital-to-charge conversion exhibits large magnitude. Our results are innovative and pioneering in the investigation of negative IOHE by the injection of spin-orbital currents. |
| title | Negative orbital Hall effect in Germanium |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2403.07254 |