Gate-tunable quantum acoustoelectric transport in graphene
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909281283997696 |
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| author | Mou, Yicheng Chen, Haonan Liu, Jiaqi Lan, Qing Wang, Jiayu Zhang, Chuanxin Wang, Yuxiang Gu, Jiaming Zhao, Tuoyu Jiang, Xue Shi, Wu Zhang, Cheng |
| author_facet | Mou, Yicheng Chen, Haonan Liu, Jiaqi Lan, Qing Wang, Jiayu Zhang, Chuanxin Wang, Yuxiang Gu, Jiaming Zhao, Tuoyu Jiang, Xue Shi, Wu Zhang, Cheng |
| contents | Transport probes the motion of quasiparticles in response to external excitations. Apart from the well-known electric and thermoelectric transport, acoustoelectric transport induced by traveling acoustic waves has been rarely explored. Here, by adopting a hybrid nanodevices integrated with piezoelectric substrates, we establish a simple design of acoustoelectric transport with gate tunability. We fabricate dual-gated acoustoelectric devices based on BN-encapsuled graphene on LiNbO3. Longitudinal and transverse acoustoelectric voltages are generated by launching pulsed surface acoustic wave. The gate dependence of zero-field longitudinal acoustoelectric signal presents strikingly similar profiles as that of Hall resistivity, providing a valid approach for extracting carrier density without magnetic field. In magnetic fields, acoustoelectric quantum oscillations appear due to Landau quantization, which are more robust and pronounced than Shubnikov-de Haas oscillations. Our work demonstrates a feasible acoustoelectric setup with gate tunability, which can be extended to the broad scope of various Van der Waals materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_20248 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gate-tunable quantum acoustoelectric transport in graphene Mou, Yicheng Chen, Haonan Liu, Jiaqi Lan, Qing Wang, Jiayu Zhang, Chuanxin Wang, Yuxiang Gu, Jiaming Zhao, Tuoyu Jiang, Xue Shi, Wu Zhang, Cheng Mesoscale and Nanoscale Physics Materials Science Transport probes the motion of quasiparticles in response to external excitations. Apart from the well-known electric and thermoelectric transport, acoustoelectric transport induced by traveling acoustic waves has been rarely explored. Here, by adopting a hybrid nanodevices integrated with piezoelectric substrates, we establish a simple design of acoustoelectric transport with gate tunability. We fabricate dual-gated acoustoelectric devices based on BN-encapsuled graphene on LiNbO3. Longitudinal and transverse acoustoelectric voltages are generated by launching pulsed surface acoustic wave. The gate dependence of zero-field longitudinal acoustoelectric signal presents strikingly similar profiles as that of Hall resistivity, providing a valid approach for extracting carrier density without magnetic field. In magnetic fields, acoustoelectric quantum oscillations appear due to Landau quantization, which are more robust and pronounced than Shubnikov-de Haas oscillations. Our work demonstrates a feasible acoustoelectric setup with gate tunability, which can be extended to the broad scope of various Van der Waals materials. |
| title | Gate-tunable quantum acoustoelectric transport in graphene |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2403.20248 |