首页|Observation of 3D acoustic quantum Hall states

Observation of 3D acoustic quantum Hall states

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Quantum Hall effect,the quantized transport phenomenon of electrons under strong magnetic fields,remains one of the hottest research topics in condensed matter physics since its discovery in 2D elec-tronic systems.Recently,as a great advance in the research of quantum Hall effects,the quantum Hall effect in 3D systems,despite its big challenge,has been achieved in the bulk ZrTe5 and Cd3As2 materials.Interestingly,Cd3As2 is a Weyl semimetal,and quantum Hall effect is hosted by the Fermi arc states on opposite surfaces via the Weyl nodes of the bulk,and induced by the unique edge states on the bound-aries of the opposite surfaces.However,such intriguing edge state distribution has not yet been experi-mentally observed.Here,we aim to reveal experimentally the unusual edge states of Fermi arcs in acoustic Weyl system with the aid of pseudo-magnetic field.Benefiting from the macroscopic nature of acoustic crystals,the pseudo-magnetic field is introduced by elaborately designed the gradient on-site energy,and the edge states of Fermi arcs on the boundaries of the opposite surfaces are unambigu-ously demonstrated in experiments.Our system serves as an ideal and highly tunable platform to explore the Hall physics in 3D system,and has the potential in the application of new acoustic devices.

Quantum Hall effectsAcoustic crystalsPseudo-magnetic fieldLandau levelsEdge states

Xuewei Zhang、Qiang Wei、Mian Peng、Weiyin Deng、Jiuyang Lu、Xueqin Huang、Suotang Jia、Mou Yan、Zhengyou Liu、Gang Chen

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State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China

Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,China

Key Laboratory of Materials Physics,Ministry of Education,School of Physics,Zhengzhou University,Zhengzhou 450001,China

Laboratory of Zhongyuan Light,School of Physics,Zhengzhou University,Zhengzhou 450001,China

Institute of Quantum Materials and Physics,Henan Academy of Sciences,Zhengzhou 450046,China

Key Laboratory of Artificial Micro-and Nanostructures of Ministry of Education and School of Physics and Technology,Wuhan University,Wuhan 430072,China

Institute for Advanced Studies,Wuhan University,Wuhan 430072,China

Institute of Quantum Materials and Physics,Henan Academy of Sciences,Zheng

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National Key R & D Program of ChinaNational Key R & D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Postdoctoral ProgramNational Postdoctoral ProgramShanxi"1331 Project",and Crossdisciplinary Innovative Research Group Project of Henan Province

2022YFA14045002022YFA1404900118907011197412011974005120340121207412812074232121254061220429012374360BX202201952023M732146232300421004

2024

10.1016/j.scib.2024.04.055

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(14)
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