论文标题
pyrochlore中多功能Weyl半分化的实验特征，旋转冰（如磁性）
Experimental signatures of versatile Weyl semimetal in pyrochlore iridate with spin-ice like magnetic orders
论文作者
论文摘要
我们报告了pyrochlore pr2ir2O7的Weyl半准状态之间的拓扑过渡的实验特征，其中IR拓扑电子和旋转冰的近距离耦合Pr时刻的顺序起着决定性作用。电阻率和霍尔电导率的磁场依赖性表现出高原和与磁场磁滞相关的急剧跳跃，类似于偶极自旋冰系统中的液体气体样过渡。此外，近托耦合受静水压力控制，表明在动量空间中田间诱导的Weyl点的位移很大程度上取决于相应的电子状态以及近托耦合强度。这些观察结果为带有相对论传导电子和局部磁矩的混合量子材料中带拓扑的工程铺设了途径。
We report experimental signatures of topological transitions among the Weyl semimetal states of pyrochlore Pr2Ir2O7, where the Kondo coupling between the Ir topological electrons and the spin-ice like orders of Pr moments plays a decisive role. The magnetic-field dependence of resistivity and the Hall conductivity exhibits a plateau and a sharp jump associated with a magnetic-field hysteresis, similar to a liquid-gas-like transition in dipolar spin ice system. Furthermore, the Kondo coupling is controlled by the hydrostatic pressure, revealing that the field-induced displacement of Weyl points in the momentum space strongly depends on the respective electronic state as well as on the Kondo coupling strength. These observations pave a route toward the engineering of band topology in hybrid quantum materials with relativistic conduction electrons and localized magnetic moments.
