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Condensed Matter > Materials Science
Title: Optical control of 4f orbital state in rare-earth metals
(Submitted on 18 Jun 2021 (v1), last revised 8 Apr 2024 (this version, v4))
Abstract: A change of orbital state alters the coupling between ions and their surroundings drastically. Orbital excitations are hence key to understand and control interaction of ions. Rare-earth (RE) elements with strong magneto-crystalline anisotropy (MCA) are important ingredients for magnetic devices. Thus, control of their localized 4f magnetic moments and anisotropy is one major challenge in ultrafast spin physics. With time-resolved X-ray absorption and resonant inelastic scattering experiments, we show for Tb metal that 4f-electronic excitations out of the ground state multiplet occur after optical pumping. These excitations are driven by inelastic 5d-4f-electron scattering, alter the 4f-orbital state and consequently the MCA with important implications for magnetization dynamics in 4f-metals, and more general for the excitation of localized electronic states in correlated materials.
Submission history
From: Nele Thielemann-Kühn [view email][v1] Fri, 18 Jun 2021 08:39:58 GMT (3022kb)
[v2] Fri, 2 Jun 2023 09:10:37 GMT (5154kb)
[v3] Fri, 15 Mar 2024 17:17:17 GMT (3337kb)
[v4] Mon, 8 Apr 2024 14:13:07 GMT (2727kb)
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