Abstract

Anisotropic superexchange interaction is one of the most important interactions in realizing exotic quantum magnetism, which is traditionally regarded to originate from magnetic ions and has no relation with the nonmagnetic ions. In our work, by studying a multi-orbital Hubbard model with spin-orbit coupling on both magnetic cations and nonmagnetic anions, we analytically demonstrate that the spin-orbit coupling on nonmagnetic anions alone can induce antisymmetric Dzyaloshinskii-Moriya interaction, symmetric anisotropic exchange and single ion anisotropy on the magnetic ions and thus it actually contributes to anisotropic superexchange on an equal footing as that of magnetic ions. Our results promise one more route to realize versatile exotic phases in condensed matter systems, long-range orders in low dimensional materials and switchable single molecule magnetic devices for recording and manipulating quantum information through nonmagnetic anions.

Graphical abstract

中文翻译：

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自旋轨道耦合通过非磁性阴离子的各向异性超交换

摘要

各向异性超交换相互作用是实现奇异量子磁性中最重要的相互作用之一，传统上它被认为起源于磁性离子，与非磁性离子无关。在我们的工作中，通过研究在磁性阳离子和非磁性阴离子上具有自旋轨道耦合的多轨道Hubbard模型，我们分析性地证明，仅在非磁性阴离子上的自旋轨道耦合可以诱导反对称Dzyaloshinskii-Moriya相互作用，对称各向异性交换和单离子各向异性对磁离子具有各向异性，因此实际上有助于在与磁离子相等的基础上实现各向异性超交换。我们的结果为在凝聚态系统中实现通用异质相提供了另一条途径，

图形概要