Wang Naizhou, You Jing-Yang, Wang Aifeng, Zhou Xiaoyuan, Zhang Zhaowei, Lai Shen, Feng Yuan-Ping, Lin Hsin, Chang Guoqing, Gao Wei-Bo
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.
Department of Physics, National University of Singapore, Singapore 117551.
Natl Sci Rev. 2023 Apr 24;11(6):nwad103. doi: 10.1093/nsr/nwad103. eCollection 2024 Jun.
Non-centrosymmetric topological material has attracted intense attention due to its superior characteristics as compared with the centrosymmetric one, although probing the local quantum geometry in non-centrosymmetric topological material remains challenging. The non-linear Hall (NLH) effect provides an ideal tool to investigate the local quantum geometry. Here, we report a non-centrosymmetric topological phase in ZrTe, probed by using the NLH effect. The angle-resolved and temperature-dependent NLH measurement reveals the inversion and ab-plane mirror symmetries breaking at <30 K, consistently with our theoretical calculation. Our findings identify a new non-centrosymmetric phase of ZrTe and provide a platform to probe and control local quantum geometry via crystal symmetries.
非中心对称拓扑材料由于其与中心对称材料相比具有的优异特性而备受关注，尽管探测非中心对称拓扑材料中的局部量子几何结构仍然具有挑战性。非线性霍尔（NLH）效应为研究局部量子几何结构提供了一个理想工具。在此，我们报道了通过使用NLH效应探测到的ZrTe中的一种非中心对称拓扑相。角度分辨和温度依赖的NLH测量揭示了在<30 K时反演对称性和面内镜像对称性的破缺，这与我们的理论计算一致。我们的发现确定了ZrTe的一种新的非中心对称相，并提供了一个通过晶体对称性来探测和控制局部量子几何结构的平台。
