论文标题
电荷掺杂对具有强旋轨耦合的Mott绝缘子的影响，ba $ _2 $ naoso $ _6 $
Effects of charge doping on Mott insulator with strong spin-orbit coupling, Ba$_2$NaOsO$_6$
论文作者
论文摘要
掺杂对Mott绝缘状态电子演化的影响已经进行了广泛的研究，以了解材料的新兴量子阶段的机制。在旋转和轨道自由度之间存在纠缠的情况下，对这些影响的研究变得越来越有趣。在这里，我们对双重钙钛矿Ba $ _2 $ naoso $ _6 $进行了全面调查，这是一种复杂的莫特绝缘子，在该杂质中，这种纠缠起着重要的作用。我们确定，绝缘磁接地状态从倾斜的抗铁磁铁（CAF）演变为超过约10％的掺杂剂水平的néel顺序。此外，我们确定磁性对称性（BLPS）相位的损坏的磁性序列前体（磁性有序状态）占据了（H-T）相图的扩展部分，并增加了掺杂。这一发现表明，局部立方对称性的破裂是由多极阶的驱动的，最明显的是抗肌甲状腺型。
The effects of doping on the electronic evolution of the Mott insulating state have been extensively studied in efforts to understand mechanisms of emergent quantum phases of materials. The study of these effects becomes ever more intriguing in the presence of entanglement between spin and orbital degrees of freedom. Here, we present a comprehensive investigation of charge doping in the double perovskite Ba$_2$NaOsO$_6$, a a complex Mott insulator where such entanglement plays an important role. We establish that the insulating magnetic ground state evolves from canted antiferromagnet (cAF)to Néel order for dopant levels exceeding ~ 10 %. Furthermore, we determine that a broken local point symmetry (BLPS) phase, precursor to the magnetically ordered state, occupies an extended portion of the (H-T) phase diagram with increased doping. This finding reveals that the breaking of the local cubic symmetry is driven by a multipolar order, most-likely of the antiferro-quadrupolar type.
