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arXiv 2402.02131cond-mat.str-elcond-mat.mes-hall
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具有反铁磁序的Weyl半金属态在Rashba- Hubbard模型中

Weyl semimetallic state with antiferromagnetic order in Rashba-Hubbard model

Thapar Institute of Engineering and Technology(塔帕尔工程技术学院)

Aastha Jain, Garima Goyal, Dheeraj Kumar Singh

AI总结:

在Rashba-Hubbard模型中,通过Hartree-Fock平均场理论发现具有反铁磁序的Weyl半金属态,并探讨其自旋纹理和鲁棒性。

摘要:

我们通过采用Hartree-Fock平均场理论研究Rashba-Hubbard模型的相图,从而确立了具有平面磁矩的反铁磁有序Weyl半金属态的存在。该相在相互作用与自旋轨道耦合的相图中被发现位于反铁磁绝缘体与Rashba金属之间。具有反铁磁有序的拓扑半金属态在存在时间反演对称性和空间反演对称性共同作用的情况下存在,尽管单独的对称性被破坏。对静态磁化率的研究表明,在实际的相互作用和自旋轨道耦合参数范围内,反铁磁序的鲁棒性。除了与Weyl点相关的边态外,我们还研究了自旋分辨的准粒子干涉,这为可能的自旋纹理提供了重要见解,特别是在Weyl点附近。

英文摘要:

We study the phase diagram of Rashba-Hubbard model by employing the Hartree-Fock meanfield theory, and thereby establish the existence of an antiferromagnetically ordered Weyl semimetallic state with in-plane magnetic moments. This phase is found to be sandwiched in between the antiferromagnetic insulator and Rashba metal in the interaction vs spin-orbit coupling phase diagram. The antiferromagnetically-ordered topological semimetallic state exists in the presence of combined time-reversal and inversion symmetry though individually both are broken. The study of the static magnetic susceptibility indicates the robustness of the antiferromagnetic order within a realistic range of interaction and spin-orbit coupling parameters. In addition to the edge states associated with the Weyl points, we also investigate the spin-resolved quasiparticle interference, which provides important insight into the possible spin texture of the bands especially in the vicinity of Weyl points.

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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