首页|Interaction between Surface Acoustic Wave and Quantum Hall Effects
Interaction between Surface Acoustic Wave and Quantum Hall Effects
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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.
刘萧、吴蒙蒙、王任飞、王兴豪、张文锋、董昱江、杜瑞瑞、刘阳、林熙
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International Center for Quantum Materials,Peking University,Beijing 100871,China
Center for Excellence,University of Chinese Academy of Sciences,Beijing 100190,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
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国家重点研发计划国家重点研发计划中国科学院战略规划重点项目国家自然科学基金国家自然科学基金国家自然科学基金Innovation Program for Quantum Science and Technology
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