Kitaev physics in the two-dimensional magnet NiPSe$_3$
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929277767778304 |
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| author | Peng, Cheng Mardanya, Sougata Petsch, Alexander N. Sharma, Vineet Kumar Li, Shuyi Jia, Chunjing Bansil, Arun Chowdhury, Sugata Turner, Joshua J. |
| author_facet | Peng, Cheng Mardanya, Sougata Petsch, Alexander N. Sharma, Vineet Kumar Li, Shuyi Jia, Chunjing Bansil, Arun Chowdhury, Sugata Turner, Joshua J. |
| contents | The Kitaev interaction, found in candidate materials such as $α$-RuCl$_3$, occurs through the metal ($M$)-ligand ($X$)-metal ($M$) paths of the edge-sharing octahedra because the large spin-orbit coupling (SOC) on the metal atoms activates directional spin interactions. Here, we show that even in $3d$ transition-metal compounds, where the SOC of the metal atom is negligible, heavy ligands can induce bond-dependent Kitaev interactions. In this work, we take as an example the $3d$ transition-metal chalcogenophosphate NiPSe$_3$ and show that the key is found in the presence of a sizable SOC on the Se $p$ orbital, one which mediates the super-exchange between the nearest-neighbor Ni sites. Our study provides a pathway for engineering enhanced Kitaev interactions through the interplay of SOC strength, lattice distortions, and chemical substitutions. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2403_09831 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Kitaev physics in the two-dimensional magnet NiPSe$_3$ Peng, Cheng Mardanya, Sougata Petsch, Alexander N. Sharma, Vineet Kumar Li, Shuyi Jia, Chunjing Bansil, Arun Chowdhury, Sugata Turner, Joshua J. Strongly Correlated Electrons Materials Science The Kitaev interaction, found in candidate materials such as $α$-RuCl$_3$, occurs through the metal ($M$)-ligand ($X$)-metal ($M$) paths of the edge-sharing octahedra because the large spin-orbit coupling (SOC) on the metal atoms activates directional spin interactions. Here, we show that even in $3d$ transition-metal compounds, where the SOC of the metal atom is negligible, heavy ligands can induce bond-dependent Kitaev interactions. In this work, we take as an example the $3d$ transition-metal chalcogenophosphate NiPSe$_3$ and show that the key is found in the presence of a sizable SOC on the Se $p$ orbital, one which mediates the super-exchange between the nearest-neighbor Ni sites. Our study provides a pathway for engineering enhanced Kitaev interactions through the interplay of SOC strength, lattice distortions, and chemical substitutions. |
| title | Kitaev physics in the two-dimensional magnet NiPSe$_3$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2403.09831 |