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arXiv 1509.04741cond-mat.mes-hall
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Dirac和Weyl半金属中磁性杂质的RKKY相互作用

RKKY interaction of magnetic impurities in Dirac and Weyl semimetals

Hao-Ran Chang, Jianhui Zhou, Shi-Xiong Wang, Wen-Yu Shan, Di Xiao

摘要:

本文从理论上研究了Dirac和Weyl半金属中磁性杂质之间的Ruderman-Kittel-Kasuya-Yosida(RKKY)相互作用。我们发现,节点间的过程,以及独特的三维自旋动量锁定,有显着的影响,在RKKY相互作用,导致海森堡和伊辛项,和一个额外的Dzyaloshinsky-Moriya项,如果反演对称性是缺席。这些相互作用可以导致丰富的自旋纹理和可能的铁磁性狄拉克和时间反演的自旋不变外尔SM。讨论了各向异性Dirac和Weyl节点对RKKY相互作用的影响。我们的结果提供了一个替代方案,工程拓扑SM和新的光的Dirac和Weyl SM的自旋电子学中的应用。

英文摘要:

We theoretically study the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between magnetic impurities in both Dirac and Weyl semimetals (SMs). We find that the internode process, as well as the unique three-dimensional spin-momentum locking, has significant influences on the RKKY interaction, resulting in both a Heisenberg and an Ising term, and an additional Dzyaloshinsky-Moriya term if the inversion symmetry is absent. These interactions can lead to rich spin textures and possible ferromagnetism in Dirac and time-reversal symmetry-invariant Weyl SMs. The effect of anisotropic Dirac and Weyl nodes on the RKKY interaction is also discussed. Our results provide an alternative scheme to engineer topological SMs and shed new light on the application of Dirac and Weyl SMs in spintronics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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