论文标题
RIXS干涉法和疾病在量子磁铁中的作用BA $ _3 $ ti $ _ {3-x} $ ir $ _ {x} $ o $ $ _9 $
RIXS interferometry and the role of disorder in the quantum magnet Ba$_3$Ti$_{3-x}$Ir$_{x}$O$_9$
论文作者
论文摘要
受到六角形旋转式旋转物理物理的几个主张的动机，在六角形ba $ _3 $ _3 $ ti $ _ {3-x} $ ir $ _x $ o $ _9 $托管IR2O9二聚体的动机上，我们在IR L3 Edder上托管IR2O9二聚体，我们报告了RESONANT IR2ONICONASTIC X-RAY散射（RIXS）。我们证明，ba $ _3 $ ti $ _ {3-x} $ ir $ _x $ o $ _9 $中的磁性受强大障碍的非常规实现，阳离子障碍会影响当地时刻的特征。 RIX干涉测量法研究了在广泛转移的动量Q上研究RIX强度，非常适合为不同的IR位点分配不同的激发。我们发现明显的IR-TI站点混合。这两种离子均分布在两个晶体学上的不相等位点上，从而在IR2O9二聚体和旋转轨道纠缠j = 1/2的矩形上共存，并共存。 RIX揭示了不同种类的强磁耦合，用于不同的粘结几何形状，突出了阳离子障碍在该化合物家族中抑制远距离磁性的作用。
Motivated by several claims of spin-orbit driven spin-liquid physics in hexagonal Ba$_3$Ti$_{3-x}$Ir$_x$O$_9$ hosting Ir2O9 dimers, we report on resonant inelastic x-ray scattering (RIXS) at the Ir L3 edge for different x. We demonstrate that magnetism in Ba$_3$Ti$_{3-x}$Ir$_x$O$_9$ is governed by an unconventional realization of strong disorder, where cation disorder affects the character of the local moments. RIXS interferometry, studying the RIXS intensity over a broad range of transferred momentum q, is ideally suited to assign different excitations to different Ir sites. We find pronounced Ir-Ti site mixing. Both ions are distributed over two crystallographically inequivalent sites, giving rise to a coexistence of quasimolecular singlet states on Ir2O9 dimers and spin-orbit entangled j=1/2 moments of 5d$^5$ Ir$^{4+}$ ions. RIXS reveals different kinds of strong magnetic couplings for different bonding geometries, highlighting the role of cation disorder for the suppression of long-range magnetic order in this family of compounds.
