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Tunable correlation effects of magnetic impurities by the cubic Rashba spin-orbit couplings by Peng, Xiong-Tao; Lin, Fang; Chen, Liang; Li, Lin; Xu, Dong-Hui; Sun, Jin-Hua is a scholarly article available to read on EtoBox.

What is Tunable correlation effects of magnetic impurities by the cubic Rashba spin-orbit couplings about?

We theoretically study the influence of the $k$-cubic Rashba spin-orbit coupling (SOC) on the correlation effects of magnetic impurities by combining the variational method and the Hirsch-Fye quantum Monte Carlo (HFQMC) simulations. Markedly different from the normal $k$-linear Rashba SOC, even a small cubic Rashba term can greatly alter the band structure and induce a Van Hove singularity in a wide range of energy, thus the single impurity local moment becomes largely tunable. The cubic Rashba SOC adopted in this work breaks the rotational symmetry, but the host material is still invariant under the operations $\mathcal{R}^z(\pi)$, $\mathcal{IR}^z(\pi/2)$, $\mathcal{M}_{xz}$, $\mathcal{M}_{yz}$, where $\mathcal{R}^z(\theta)$ is the rotation of angle $\theta$ about the $z$-axis, $\mathcal{I}$ is the inversion operator and $\mathcal{M}_{xz}$ ($\mathcal{M}_{yz}$) is the mirror reflection about the $x$-$z$ ($y$-$z$) principal plane. Saliently, various components of spin-spin correlation between the single magnetic impurity and the conduction electrons show three- or six-fold rotational symmetry. This unique feature is due to the triple winding of the spins with a $2\pi$ rotation of $\

Author

Peng, Xiong-Tao; Lin, Fang; Chen, Liang; Li, Lin; Xu, Dong-Hui; Sun, Jin-Hua

Published

2023

Language

EN