RKKY interaction of magnetic impurities in Dirac and Weyl semimetals

被引：108
作者：
Chang, Hao-Ran [1 ,2 ]
Zhou, Jianhui [3 ]
Wang, Shi-Xiong [1 ,2 ]
Shan, Wen-Yu [3 ]
Xiao, Di [3 ]
机构：
[1] Sichuan Normal Univ, Dept Phys, Chengdu 610066, Sichuan, Peoples R China
[2] Sichuan Normal Univ, Inst Solid State Phys, Chengdu 610066, Sichuan, Peoples R China
[3] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA
来源：
PHYSICAL REVIEW B | 2015年 / 92卷 / 24期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
DISCOVERY; STATE; FERROMAGNETISM;
D O I：
10.1103/PhysRevB.92.241103
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
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页数：5
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