| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Interaction between Surface Acoustic Wave and Quantum Hall Effects |
| Xiao Liu1, Mengmeng Wu1, Renfei Wang1, Xinghao Wang1, Wenfeng Zhang1, Yujiang Dong1, Rui-Rui Du1,2, Yang Liu1,3*, and Xi Lin1,3,4* |
1International Center for Quantum Materials, Peking University, Beijing 100871, China
2Center for Excellence, University of Chinese Academy of Sciences, Beijing 100190, China
3Hefei National Laboratory, Hefei 230088, China
4Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing 100871, China
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| Cite this article: |
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Xiao Liu, Mengmeng Wu, Renfei Wang et al 2024 Chin. Phys. Lett. 41 047301 |
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Abstract Surface acoustic wave (SAW) is a powerful technique for investigating quantum phases appearing in two-dimensional electron systems. The electrons respond to the piezoelectric field of SAW through screening, attenuating its amplitude, and shifting its velocity, which is described by the relaxation model. In this work, we systematically study this interaction using orders of magnitude lower SAW amplitude than those in previous studies. At high magnetic fields, when electrons form highly correlated states such as the quantum Hall effect, we observe an anomalously large attenuation of SAW, while the acoustic speed remains considerably high, inconsistent with the conventional relaxation model. This anomaly exists only when the SAW power is sufficiently low.
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Received: 07 February 2024
Express Letter
Published: 01 April 2024
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| PACS: |
73.43.-f
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(Quantum Hall effects)
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05.60.Gg
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(Quantum transport)
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77.65.Dq
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(Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics)
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