CaIrO中的$j_\mathrm{eff} = 1/2$赝自旋连续体$_3$
A $j_\mathrm{eff} = 1/2$ pseudospinon continuum in CaIrO$_3$
摘要：
在所谓的$j_\mathrm{eff} = 1/2$体系中，包括某些铱酸盐和铼酸盐，基态中$t_\mathrm{2g}$轨道的相干叠加引起强烈依赖于键几何形状的跳跃过程。共振非弹性X射线散射（RIXS）测量CaIrO $_3$揭示了一个原型的$j_\mathrm{eff} = 1/2$赝自旋连续体，一维（1D）磁系统的标志，尽管它的三维晶体结构。实验谱与计算的弱耦合自旋1/2链的磁动力学结构因子进行了比较。我们属性的发病，这样的准一维磁性之间的磁相互作用的根本差异$j_\mathrm{eff} = 1/2$赝自旋沿角和边共享债券在CaIrO $_3$。
英文摘要：
In so-called $j_\mathrm{eff} = 1/2$ systems, including some iridates and ruthenates, the coherent superposition of $t_\mathrm{2g}$ orbitals in the ground state gives rise to hopping processes that strongly depend on the bond geometry. Resonant inelastic x-ray scattering (RIXS) measurements on CaIrO$_3$ reveal a prototypical $j_\mathrm{eff} = 1/2$ pseudospinon continuum, a hallmark of one-dimensional (1D) magnetic systems despite its three-dimensional crystal structure. The experimental spectra compare very well to the calculated magnetic dynamical structure factor of weakly coupled spin-1/2 chains. We attribute the onset of such quasi-1D magnetism to the fundamental difference in the magnetic interactions between the $j_\mathrm{eff} = 1/2$ pseudospins along the corner- and edge-sharing bonds in CaIrO$_3$.
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