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| Hauptverfasser: | , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Online-Zugang: | https://arxiv.org/abs/2405.16709 |
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| _version_ | 1866914233447350272 |
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| author | Lee, Inhee Cen, Jiefu Molchanov, Oleksandr Feng, Shi Huey, Warren L. van Tol, Johan Goldberger, Joshua E. Trivedi, Nandini Kee, Hae-Young Hammel, P. Chris |
| author_facet | Lee, Inhee Cen, Jiefu Molchanov, Oleksandr Feng, Shi Huey, Warren L. van Tol, Johan Goldberger, Joshua E. Trivedi, Nandini Kee, Hae-Young Hammel, P. Chris |
| contents | CrX$_3$ (X = Cl, Br, I) have the same crystal structure and Hamiltonian but different ligand spin-orbit coupling (SOC) constant $λ_X$, providing excellent material platform exploring for exotic two-dimensional (2D) spin orders. Their microscopic mechanism underlying 2D spin physics remain unestablished, along with experimental corroboration of Kitaev exchange interaction, central to realizing topological quantum spin liquids. Finding direct evidence for Kitaev interaction and determining its value has been an essential but formidable challenge in Kitaev physics. Here we report the direct Kitaev interaction signature in magnetic anisotropy measured by ferromagnetic resonance (FMR) spectroscopy. We present measured values of Heisenberg $J$, Kitaev $K$, and off-diagonal symmetric $Γ$ exchange interactions in CrX$_3$ determined using FMR and exact diagonalization. $K$ and $Γ$ exhibit dominant dependencies on $λ_X$, indicating its central role in 2D magnetism. Our study provides a foundation for designing 2D magnetic materials exhibiting novel behaviors by tuning intrinsic material parameters such as SOC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_16709 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spin-orbit coupling controlled two-dimensional magnetism in chromium trihalides Lee, Inhee Cen, Jiefu Molchanov, Oleksandr Feng, Shi Huey, Warren L. van Tol, Johan Goldberger, Joshua E. Trivedi, Nandini Kee, Hae-Young Hammel, P. Chris Strongly Correlated Electrons Materials Science CrX$_3$ (X = Cl, Br, I) have the same crystal structure and Hamiltonian but different ligand spin-orbit coupling (SOC) constant $λ_X$, providing excellent material platform exploring for exotic two-dimensional (2D) spin orders. Their microscopic mechanism underlying 2D spin physics remain unestablished, along with experimental corroboration of Kitaev exchange interaction, central to realizing topological quantum spin liquids. Finding direct evidence for Kitaev interaction and determining its value has been an essential but formidable challenge in Kitaev physics. Here we report the direct Kitaev interaction signature in magnetic anisotropy measured by ferromagnetic resonance (FMR) spectroscopy. We present measured values of Heisenberg $J$, Kitaev $K$, and off-diagonal symmetric $Γ$ exchange interactions in CrX$_3$ determined using FMR and exact diagonalization. $K$ and $Γ$ exhibit dominant dependencies on $λ_X$, indicating its central role in 2D magnetism. Our study provides a foundation for designing 2D magnetic materials exhibiting novel behaviors by tuning intrinsic material parameters such as SOC. |
| title | Spin-orbit coupling controlled two-dimensional magnetism in chromium trihalides |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2405.16709 |