论文标题
$α$ -rucl $ _3 $的压力调节用于理想的Kitaev-limit
Pressure-tuning of $α$-RuCl$_3$ towards the ideal Kitaev-limit
论文作者
论文摘要
我们报告发现在分层的Kitaev材料$α$ -rucl $ _3 $中发现了引人入胜的压力驱动相变。通过分析Bragg散射以及高质量单晶的弥散散射，我们揭示了整个晶体层堆叠的集体重组。重要的是，这种转换还会影响rucl $ _3 $蜂窝层的结构，该结构获得了高三角对称性，单个RU-RU距离为3.41Å，单个RU-CL-RU键角为92.8°。因此，静水压力允许调整$α$ -rucl $ _3 $的结构，更接近理想的kitaev-limit。高对称阶段也可以通过双轴应力来稳定，这可以解释较早报道的相互冲突的结果，更重要的是，使高对称相可用于各种实验。
We report the discovery of an intriguing pressure-driven phase transformation in the layered Kitaev-material $α$-RuCl$_3$. By analyzing both the Bragg scattering as well as the diffuse scattering of high-quality single crystals, we reveal a collective reorganization of the layer stacking throughout the crystal. Importantly, this transformation also effects the structure of the RuCl$_3$ honeycomb layers, which acquire a high trigonal symmetry with a single Ru--Ru distance of 3.41Å and a single Ru--Cl--Ru bond angle of 92.8°. Hydrostatic pressure therefore allows to tune the structure of $α$-RuCl$_3$ much closer to the ideal Kitaev-limit. The high-symmetry phase can also be stabilized by biaxial stress, which can explain conflicting results reported earlier and, more importantly, makes the high-symmetry phase accessible to a variety of experiments.
