Spin-order-dependent magneto-elastic coupling in two dimensional antiferromagnetic MnPSe3 observed through Raman spectroscopy
Spin-order-dependent magneto-elastic coupling in two dimensional antiferromagnetic MnPSe3 observed through Raman spectroscopy
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DOI：
10.1038/s41699-024-00441-4
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发表时间：
2024-01-27
影响因子：
9.7
通讯作者：
Tartakovskii，Alexander I.
中科院分区：
文献类型：
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作者：
Gillard，Daniel J.;Wolverson，Daniel;Tartakovskii，Alexander I.
层状反铁磁性材料最近作为二维家族中一个有趣的子集出现，提供了一种高度可访问的体系，具有依赖层数的磁性的前景。此外，过渡金属磷三盐化合物MPX3(M=过渡金属；X=硫族)为研究磁性和晶格自由度之间的基本相互作用提供了一个平台，并进一步探索了自旋电子学和磁农学的发展领域。在这里，我们结合温度相关的拉曼光谱和密度泛函理论，通过Kramers-Anderson超交换路径，在体相和少层锰磷三硒化合物(MnPSe3)中研究了非磁性亚晶格中锰的自旋自由度和晶格振动之间的磁序依赖的相互作用。我们观察到主要与非磁性亚晶格有关的声子模随温度的非线性位移，揭示了它们在74 K的Néel温度以下的非平凡的自旋-声子耦合，这使得我们能够提取特定于模式的自旋-声子耦合常数。
Layered antiferromagnetic materials have recently emerged as an intriguing subset of the two-dimensional family providing a highly accessible regime with prospects for layer-number-dependent magnetism. Furthermore, transition metal phosphorus trichalcogenides, MPX3(M = transition metal; X = chalcogen) provide a platform on which to investigate fundamental interactions between magnetic and lattice degrees of freedom and further explore the developing fields of spintronics and magnonics. Here, we use a combination of temperature dependent Raman spectroscopy and density functional theory to explore magnetic-ordering-dependent interactions between the manganese spin degree of freedom and lattice vibrations of the non-magnetic sub-lattice via a Kramers-Anderson super-exchange pathway in both bulk, and few-layer, manganese phosphorus triselenide (MnPSe3). We observe a nonlinear temperature-dependent shift of phonon modes predominantly associated with the non-magnetic sub-lattice, revealing their non-trivial spin-phonon coupling below the Néel temperature at 74 K, allowing us to extract mode-specific spin-phonon coupling constants.