Revealing the Dominance of the Orbital Hall Effect over Spin in Transition Metal Heterostructures
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915354493583360 |
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| author | Costa, J. L. Santos, E. Mendes, J. B. S. Azevedo, A. |
| author_facet | Costa, J. L. Santos, E. Mendes, J. B. S. Azevedo, A. |
| contents | We study inverse spin and orbital Hall effects in 19 transition metals using spin-pumping driven by ferromagnetic resonance. Spin-to-charge conversion was measured in YIG/X(5), while orbital-to-charge conversion was probed in YIG/Pt(2)/X(5) heterostructures. Here, X represents the different transition metals. Surprisingly, the orbital contribution overwhelmingly dominates over the spin response, clarifying the challenge of disentangling these effects. Our results largely agree with first-principles predictions for spin and orbital Hall conductivities but reveal discrepancies in select materials. These findings emphasize the fundamental role of the orbital Hall effect, and position orbitronics as a pivotal frontier in condensed matter physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_08425 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Revealing the Dominance of the Orbital Hall Effect over Spin in Transition Metal Heterostructures Costa, J. L. Santos, E. Mendes, J. B. S. Azevedo, A. Mesoscale and Nanoscale Physics Materials Science We study inverse spin and orbital Hall effects in 19 transition metals using spin-pumping driven by ferromagnetic resonance. Spin-to-charge conversion was measured in YIG/X(5), while orbital-to-charge conversion was probed in YIG/Pt(2)/X(5) heterostructures. Here, X represents the different transition metals. Surprisingly, the orbital contribution overwhelmingly dominates over the spin response, clarifying the challenge of disentangling these effects. Our results largely agree with first-principles predictions for spin and orbital Hall conductivities but reveal discrepancies in select materials. These findings emphasize the fundamental role of the orbital Hall effect, and position orbitronics as a pivotal frontier in condensed matter physics. |
| title | Revealing the Dominance of the Orbital Hall Effect over Spin in Transition Metal Heterostructures |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2506.08425 |