Interaction between Surface Acoustic Wave and Quantum Hall Effects

刘萧 ¹吴蒙蒙 ¹王任飞 ¹王兴豪 ¹张文锋 ¹董昱江 ¹杜瑞瑞 ²刘阳 ³林熙⁴

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作者信息

1. International Center for Quantum Materials,Peking University,Beijing 100871,China
2. International Center for Quantum Materials,Peking University,Beijing 100871,China;Center for Excellence,University of Chinese Academy of Sciences,Beijing 100190,China
3. International Center for Quantum Materials,Peking University,Beijing 100871,China;Hefei National Laboratory,Hefei 230088,China
4. International Center for Quantum Materials,Peking University,Beijing 100871,China;Hefei National Laboratory,Hefei 230088,China;Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials,Peking University,Beijing 100871,China
折叠

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,at-tenuating 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,in-consistent with the conventional relaxation model.This anomaly exists only when the SAW power is sufficiently low.

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基金项目

国家重点研发计划(2021YFA1401900)

国家重点研发计划(2019YFA0308403)

中国科学院战略规划重点项目(XDB33030000)

国家自然科学基金(92065104)

国家自然科学基金(12074010)

国家自然科学基金(12141001)

Innovation Program for Quantum Science and Technology(2021ZD0302602)

出版年

2024

中国物理快报(英文版)

中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDCSCDEI

影响因子：0.515

ISSN：0256-307X

参考文献量48

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