Anomalous acousto-current within the quantum Hall plateaus
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866914275817160704 |
|---|---|
| author | Wang, Renfei Liu, Xiao Wu, Mengmeng Chung, Yoon Jang Gupta, Adbhut Baldwin, Kirk W. Shayegan, Mansour Pfeiffer, Loren Lin, Xi Liu, Yang |
| author_facet | Wang, Renfei Liu, Xiao Wu, Mengmeng Chung, Yoon Jang Gupta, Adbhut Baldwin, Kirk W. Shayegan, Mansour Pfeiffer, Loren Lin, Xi Liu, Yang |
| contents | We systematically study the acousto-current of two-dimensional electron systems in the integer and fractional quantum Hall regimes using surface acoustic waves. We are able to separate the co-existing acoustic scattering and drag, when phonons induce drag current and tune the electron conductivity, respectively. At large acoustic power, the drag current is finite when the system is compressible and exhibits minima when incompressible quantum Hall effects appear. Surprisingly, it exhibits anomalously large bipolar spikes within the quantum Hall plateaus while it vanishes linearly with reduced acoustic power at compressible phases. The current peaks reverse their polarity at the two flanks of exact integer or fractional fillings, consistent with the opposite electric charge of the quasiparticle/quasihole. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_17197 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Anomalous acousto-current within the quantum Hall plateaus Wang, Renfei Liu, Xiao Wu, Mengmeng Chung, Yoon Jang Gupta, Adbhut Baldwin, Kirk W. Shayegan, Mansour Pfeiffer, Loren Lin, Xi Liu, Yang Mesoscale and Nanoscale Physics We systematically study the acousto-current of two-dimensional electron systems in the integer and fractional quantum Hall regimes using surface acoustic waves. We are able to separate the co-existing acoustic scattering and drag, when phonons induce drag current and tune the electron conductivity, respectively. At large acoustic power, the drag current is finite when the system is compressible and exhibits minima when incompressible quantum Hall effects appear. Surprisingly, it exhibits anomalously large bipolar spikes within the quantum Hall plateaus while it vanishes linearly with reduced acoustic power at compressible phases. The current peaks reverse their polarity at the two flanks of exact integer or fractional fillings, consistent with the opposite electric charge of the quasiparticle/quasihole. |
| title | Anomalous acousto-current within the quantum Hall plateaus |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2402.17197 |