Ultrafast non-equilibrium magnon generation and collapse of spin-orbit hybridization gaps in iron
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912468777828352 |
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| author | Zheng, Xinwei Haque, Shabnam Strüber, Christian Weinelt, Martin |
| author_facet | Zheng, Xinwei Haque, Shabnam Strüber, Christian Weinelt, Martin |
| contents | We distinguish between longitudinal and transverse spin excitations in the ultrafast response of iron by probing exchange splitting ΔEex and magnetic linear dichroism (MLD) in time- and angleresolved photoemission. Comparing spin-split partner bands at the Fermi level shows that ΔEex remains constant upon optical excitation. In contrast, the different MLD response of spin-orbitsplit valence bands reveals non-equilibrium, transverse spin dynamics. Magnon generation in Fe is ultrafast, electronic band specific, and drives the collapse of spin-orbit hybridization gaps. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_04875 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultrafast non-equilibrium magnon generation and collapse of spin-orbit hybridization gaps in iron Zheng, Xinwei Haque, Shabnam Strüber, Christian Weinelt, Martin Other Condensed Matter Strongly Correlated Electrons We distinguish between longitudinal and transverse spin excitations in the ultrafast response of iron by probing exchange splitting ΔEex and magnetic linear dichroism (MLD) in time- and angleresolved photoemission. Comparing spin-split partner bands at the Fermi level shows that ΔEex remains constant upon optical excitation. In contrast, the different MLD response of spin-orbitsplit valence bands reveals non-equilibrium, transverse spin dynamics. Magnon generation in Fe is ultrafast, electronic band specific, and drives the collapse of spin-orbit hybridization gaps. |
| title | Ultrafast non-equilibrium magnon generation and collapse of spin-orbit hybridization gaps in iron |
| topic | Other Condensed Matter Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2507.04875 |