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Resonant inelastic x-ray scattering study of vector chiral ordered kagome antiferromagnet
npj Quantum Materials ( IF 5.7 ) Pub Date : 2020-11-02 , DOI: 10.1038/s41535-020-00282-6
Zijian Xiong , Trinanjan Datta , Dao-Xin Yao

We study the resonant inelastic x-ray scattering (RIXS) features of vector chiral ordered kagome antiferromagnets. Utilizing a group theoretical formalism that respects lattice site symmetry, we calculated the L-edge magnon contribution for the vesignieite compound BaCu3V2O8(OH)2. We show that polarization dependence of the L-edge RIXS spectrum can be used to track magnon branches. We predict a non-zero L-edge signal in the non-cross ππ polarization channel. At the K-edge, we derived the two-site effective RIXS and Raman scattering operator for two-magnon excitation in vesignieite using the Shastry–Shraiman formalism. Our derivation considers spin-orbit coupling effects in virtual hopping processes. We find vector chiral correlation (four-spin) contribution that is proportional to the RIXS spectrum. Our scattering operator formalism can be applied to a host of non-collinear non-coplanar magnetic materials at both the L and K-edge. We demonstrate that vector chiral correlations can be accessed by RIXS experiments.



中文翻译:

载体手性有序kagome反铁磁体的共振非弹性x射线散射研究

我们研究了矢量手性有序kagome反铁磁体的共振非弹性x射线散射(RIXS)特征。利用一组尊重晶格对称性的理论形式主义,我们计算了硅镁石化合物BaCu 3 V 2 O 8(OH)2L边缘磁振子贡献。我们表明,L边缘RIXS光谱的偏振相关性可用于跟踪磁振子分支。我们预测非交叉π - π极化通道中的非零L边缘信号。在K边沿,我们使用Shastry-Shraiman形式主义推导了两点有效RIXS和拉曼散射算子,用于在硅钙石中进行两磁振子激发。我们的推导考虑了虚拟跳跃过程中的自旋轨道耦合效应。我们发现与RIXS光谱成比例的矢量手性相关性(四纺)。我们的散射算子形式可以应用于L边K边的许多非共线非共面磁性材料。我们证明可以通过RIXS实验访问矢量手性相关性。

更新日期:2020-11-02
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