Magneto-Optical Study of Chiral Magnetic Modes in NiI$_{2}$: Direct Evidence for Kitaev Interactions
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| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917069589577728 |
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| author | Panda, Kartik Kim, Chaebin Bazyliansky, Daniel Taboada-Gutiérrez, Javier Mardelé, Florian Le Dzian, Jan Levy, Guy Kim, Jae Ha Lee, Youjin Park, Bumchan Mourigal, Martin Kim, Jae Hoon Kuzmenko, Alexey B. Orlita, Milan Park, Je-Geun Bachar, Nimrod |
| author_facet | Panda, Kartik Kim, Chaebin Bazyliansky, Daniel Taboada-Gutiérrez, Javier Mardelé, Florian Le Dzian, Jan Levy, Guy Kim, Jae Ha Lee, Youjin Park, Bumchan Mourigal, Martin Kim, Jae Hoon Kuzmenko, Alexey B. Orlita, Milan Park, Je-Geun Bachar, Nimrod |
| contents | Bond-dependent magnetic interactions, particularly those described by the Kitaev model, have emerged as a key pathway toward realizing unconventional magnetic states such as quantum spin liquids and topologically nontrivial excitations, including skyrmions. These interactions frustrate conventional magnetic order and give rise to rich collective behavior that continues to challenge both theory and experiment. While Kitaev physics has been extensively explored in the context of honeycomb magnets, direct evidence for its role in real materials remains scarce. Magnetic van der Waals (vdW) materials have emerged as a versatile platform for exploring low-dimensional electrical, magnetic, and correlated electronic phenomena, and provide a fertile ground for potential applications ranging from spintronics to multiferroic devices and quantum information technologies. Here, we demonstrate, through magneto-transmission, Faraday angle rotation, and magnetic circular dichroism measurements, that the magnetic excitation spectrum of NiI$_2$, a van der Waals multiferroic material, is more accurately captured by a Kitaev-based spin model than by the previously invoked helical spin framework. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_06093 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magneto-Optical Study of Chiral Magnetic Modes in NiI$_{2}$: Direct Evidence for Kitaev Interactions Panda, Kartik Kim, Chaebin Bazyliansky, Daniel Taboada-Gutiérrez, Javier Mardelé, Florian Le Dzian, Jan Levy, Guy Kim, Jae Ha Lee, Youjin Park, Bumchan Mourigal, Martin Kim, Jae Hoon Kuzmenko, Alexey B. Orlita, Milan Park, Je-Geun Bachar, Nimrod Strongly Correlated Electrons Bond-dependent magnetic interactions, particularly those described by the Kitaev model, have emerged as a key pathway toward realizing unconventional magnetic states such as quantum spin liquids and topologically nontrivial excitations, including skyrmions. These interactions frustrate conventional magnetic order and give rise to rich collective behavior that continues to challenge both theory and experiment. While Kitaev physics has been extensively explored in the context of honeycomb magnets, direct evidence for its role in real materials remains scarce. Magnetic van der Waals (vdW) materials have emerged as a versatile platform for exploring low-dimensional electrical, magnetic, and correlated electronic phenomena, and provide a fertile ground for potential applications ranging from spintronics to multiferroic devices and quantum information technologies. Here, we demonstrate, through magneto-transmission, Faraday angle rotation, and magnetic circular dichroism measurements, that the magnetic excitation spectrum of NiI$_2$, a van der Waals multiferroic material, is more accurately captured by a Kitaev-based spin model than by the previously invoked helical spin framework. |
| title | Magneto-Optical Study of Chiral Magnetic Modes in NiI$_{2}$: Direct Evidence for Kitaev Interactions |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2511.06093 |