Interaction between Surface Acoustic Wave and Quantum Hall Effects
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
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| _version_ | 1866914275804577792 |
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| author | Liu, Xiao Wu, Mengmeng Wang, Renfei Wang, Xinghao Zhang, Wenfeng Dong, Yujiang Du, Rui-Rui Liu, Yang Lin, Xi |
| author_facet | Liu, Xiao Wu, Mengmeng Wang, Renfei Wang, Xinghao Zhang, Wenfeng Dong, Yujiang Du, Rui-Rui Liu, Yang Lin, Xi |
| contents | 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 SAWthrough 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 that 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_04724 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Interaction between Surface Acoustic Wave and Quantum Hall Effects Liu, Xiao Wu, Mengmeng Wang, Renfei Wang, Xinghao Zhang, Wenfeng Dong, Yujiang Du, Rui-Rui Liu, Yang Lin, Xi Mesoscale and Nanoscale Physics 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 SAWthrough 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 that 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. |
| title | Interaction between Surface Acoustic Wave and Quantum Hall Effects |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2402.04724 |