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Magnetic Impurities in Dirac and Weyl Semimetals | | Hao-Ran Chang
; Jianhui Zhou
; Shi-Xiong Wang
; Wen-Yu Shan
; Di Xiao
; | | Date: |
15 Sep 2015 | | Abstract: | 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 possibly 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 a general scheme to engineer topological SMs and shed new light on the
application of Dirac and Weyl SMs in spintronics. | | Source: | arXiv, 1509.4741 | | Services: | Forum | Review | PDF | Favorites | |
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