跨越范德华间隙的高自旋轨道相互作用控制范德华铁磁体中的层间铁磁性
High-Spin Orbital Interactions Across van der Waals Gaps Controlling the Interlayer Ferromagnetism in van der Waals Ferromagnets.
作者信息
Koo Hyun-Joo, Kremer Reinhard K, Whangbo Myung-Hwan
机构信息
Department of Chemistry and Research Institute for Basic Sciences, Kyung Hee University, Seoul 02447, Republic of Korea.
Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
出版信息
J Am Chem Soc. 2022 Sep 14;144(36):16272-16275. doi: 10.1021/jacs.2c06741. Epub 2022 Aug 31.
We examined what interactions control the sign and strength of the interlayer coupling in van der Waals ferromagnets such as FeGeTe, CrGeTe, CrI, and VI to find that high-spin orbital interactions across the van der Waals gaps are a key to understanding their ferromagnetism. Interlayer ferromagnetic coupling in FeGeTe, CrGeTe, and CrI is governed by the high-spin two-orbital two-electron destabilization, but that in VI by the high-spin four-orbital two-electron stabilization. These interactions explain a number of seemingly puzzling observations in van der Waals ferromagnets.
我们研究了何种相互作用控制着诸如FeGeTe、CrGeTe、CrI和VI等范德华铁磁体中层间耦合的符号和强度，结果发现跨越范德华间隙的高自旋轨道相互作用是理解其铁磁性的关键。FeGeTe、CrGeTe和CrI中的层间铁磁耦合由高自旋双轨道双电子失稳作用控制，而VI中的层间铁磁耦合则由高自旋四轨道双电子稳定作用控制。这些相互作用解释了范德华铁磁体中一些看似令人困惑的现象。
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