Log-periodic quantum magneto-oscillations and discrete-scale invariance in topological material HfTe5. Issue 5 (6th August 2019)

• Record Type: Journal Article
• Authors: Wang, Huichao; Liu, Yanzhao; Liu, Yongjie; Xi, Chuanying; Wang, Junfeng; Liu, Jun; Wang, Yong; Li, Liang; Lau, Shu Ping; Tian, Mingliang; Yan, Jiaqiang; Mandrus, David; Dai, Ji-Yan; Liu, Haiwen; Xie, Xincheng; Wang, Jian
• Is Part Of: National science review. Volume 6:Issue 5(2019)
• Page Start: 914
• Page End: 920
• Publication Date: 2019-08-06
• Subjects: log-periodic oscillations -- discrete-scale invariance -- topological materials -- Dirac materials -- magnetoresistance -- Hall resistance; Science -- Periodicals; 505
• DOI: 10.1093/nsr/nwz110
• Languages: English
• ISSNs: 2095-5138

Abstract

Abstract: 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 log B -periodicity with a phase shift. The finding of the log B 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.