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Log-periodic quantum magneto-oscillations and discrete-scale invariance in topological material HfTe5
National Science Review ( IF 16.3 ) Pub Date : 2019-08-06 , DOI: 10.1093/nsr/nwz110
Huichao Wang 1, 2 , Yanzhao Liu 1 , Yongjie Liu 3 , Chuanying Xi 4 , Junfeng Wang 3 , Jun Liu 5 , Yong Wang 5 , Liang Li 3 , Shu Ping Lau 2 , Mingliang Tian 4 , Jiaqiang Yan 6 , David Mandrus 6, 7 , Ji-Yan Dai 2 , Haiwen Liu 8 , Xincheng Xie 1, 9, 10, 11 , Jian Wang 1, 9, 10, 11
Affiliation  

Discrete-scale invariance (DSI) is a phenomenon featuring intriguing log-periodicity that can be rarely observed in quantum systems. Here, we report the log-periodic quantum oscillations in the longitudinal magnetoresistivity (ρxx) and the Hall traces (ρyx) of HfTe5 crystals, which reveal the DSI in the transport-coefficients matrix. The oscillations in ρxx and ρyx show the consistent logB-periodicity with a phase shift. The finding of the logB oscillations in the Hall resistance supports the physical mechanism as a general quantum effect originating from the resonant scattering. Combined with theoretical simulations, we further clarify the origin of the log-periodic oscillations and the DSI in the topological materials. This work evidences the universality of the DSI in the Dirac materials and provides indispensable information for a full understanding of this novel phenomenon.

中文翻译:


拓扑材料 HfTe5 中的对数周期量子磁振荡和离散尺度不变性



离散尺度不变性(DSI)是一种具有有趣的对数周期性的现象,在量子系统中很少观察到。在这里,我们报告了 HfTe 5晶体的纵向磁阻 ( ρ xx ) 和霍尔迹线 ( ρ yx ) 中的对数周期量子振荡,揭示了输运系数矩阵中的 DSI。 ρ xxρ yx中的振荡显示出具有相移的一致 log B周期性。霍尔电阻中 log B振荡的发现支持了作为源自共振散射的一般量子效应的物理机制。结合理论模拟,我们进一步阐明了拓扑材料中对数周期振荡和DSI的起源。这项工作证明了 DSI 在狄拉克材料中的普遍性,并为充分理解这一新现象提供了不可或缺的信息。
更新日期:2019-08-06
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