Electronic structure of Co 3d states in the Kitaev material candidate honeycomb cobaltate Na3Co2SbO6 probed with x-ray dichroism
Electronic structure of Co 3d states in the Kitaev material candidate honeycomb cobaltate Na3Co2SbO6 probed with x-ray dichroism
复制标题
用 X 射线二色性探测 Kitaev 材料候选蜂窝状钴酸盐 Na3Co2SbO6 中 Co 3d 态的电子结构
DOI：
10.1103/physrevb.107.214443
复制
发表时间：
2023
影响因子：
3.7
通讯作者：
Zheng, H.
中科院分区：
文献类型：
--
作者：
van Veenendaal, M.;Poldi, E. H.;Veiga, L. S.;Bencok, P.;Fabbris, G.;Tartaglia, R.;McChesney, J. L.;Freeland, J. W.;Hemley, R. J.;Zheng, H.
最近的预测表明，蜂窝晶格的离子可以托管占主导地位的Kitaev相互作用提供了一个令人兴奋的方向，探索新的路线，以稳定Kitaev的量子自旋液体在真实的材料已被挑选出来作为一个潜在的材料候选人提供的自旋和轨道矩耦合到搁浅状态，三角晶场和自旋轨道耦合的相对强度可以定制的Co离子。利用X射线线性二色性（XLD）和X射线磁性圆二色性（XMCD）实验，结合组态相互作用计算，我们证实了三角晶场作用于洋葱的反直觉正号，并检验了电子基态描述的有效性。实验结果支持最近的理论预测，压缩（伸长）的八面体沿着（垂直于）三角轴将驱动这个钴酸盐向Kitaev极限，假设电子基态的字符被保存。
The recent prediction that honeycomb lattices ofions could host dominant Kitaev interactions provides an exciting direction for exploration of new routes to stabilizing Kitaev's quantum spin liquid in real materials.has been singled out as a potential material candidate provided that spin and orbital moments couple into aground state, and that the relative strength of trigonal crystal field and spin-orbit coupling acting on Co ions can be tailored. Using x-ray linear dichroism (XLD) and x-ray magnetic circular dichroism (XMCD) experiments, alongside configuration interaction calculations, we confirm the counterintuitive positive sign of the trigonal crystal field acting onions and test the validity of thedescription of the electronic ground state. The results lend experimental support to recent theoretical predictions that a compression (elongation) ofoctahedra along (perpendicular to) the trigonal axis would drive this cobaltate toward the Kitaev limit, assuming thecharacter of the electronic ground state is preserved.