论文标题
非中心霍尔效应，具有非中心对称拓扑阶段$ _5 $
Nonlinear Hall effect with non-centrosymmetric topological phase in ZrTe$_5$
论文作者
论文摘要
与中心对称性相比，由于其优越的特征，非中心对称拓扑材料引起了极大的关注。在一侧，来自量子波函数的全局几何特性的拓扑阶段保持不变，另一侧，由于局部量子几何形状的重新分配，预计丰富的外来现象仅在非核对称性现象中出现。而探测非中心对称拓扑材料中的局部量子几何形状仍然具有挑战性。在这里，我们报告了由非线性霍尔（NLH）效应探测的Zrte $ _5 $中的非中心对称拓扑阶段。角度分辨和依赖温度的NLH测量揭示了与我们的理论计算一致的反转和平面镜子对称性的破裂。我们的发现确定了Zrte $ _5 $的新的非中心对称相位，并提供了一个通过晶体对称性探测和控制局部量子几何形状的平台。
The non-centrosymmetric topological material has attracted intense attention due to its superior characters as compared to the centrosymmetric one. On one side, the topological phase coming from global geometric properties of the quantum wave function remains unchanged, on the other side, abundant exotic phenomena are predicted to be merely emerged in non-centrosymmetric ones, due to the redistribution of local quantum geometry. Whereas, probing the local quantum geometry in non-centrosymmetric topological material remains challenging. Here, we report a non-centrosymmetric topological phase in ZrTe$_5$, probed by the nonlinear Hall (NLH) effect. The angle-resolved and temperature-dependent NLH measurement reveals the inversion and ab-plane mirror symmetries breaking under 30 K, consistent with our theoretical calculation. Our findings identify a new non-centrosymmetric phase of ZrTe$_5$ and provide a platform to probe and control local quantum geometry via crystal symmetries.
