Scanning gate spectroscopy of transport across a quantum Hall nano-island
We explore transport across an ultra-small quantum Hall island (QHI) formed by closed quantum Hall edge states and connected to propagating edge channels through tunnel barriers. Scanning gate microscopy and scanning gate spectroscopy are used to first localize and then study a single QHI near a qua...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/1/013049 |
| _version_ | 1827874583568449536 |
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| author | F Martins S Faniel B Rosenow M G Pala H Sellier S Huant L Desplanque X Wallart V Bayot B Hackens |
| author_facet | F Martins S Faniel B Rosenow M G Pala H Sellier S Huant L Desplanque X Wallart V Bayot B Hackens |
| author_sort | F Martins |
| collection | DOAJ |
| description | We explore transport across an ultra-small quantum Hall island (QHI) formed by closed quantum Hall edge states and connected to propagating edge channels through tunnel barriers. Scanning gate microscopy and scanning gate spectroscopy are used to first localize and then study a single QHI near a quantum point contact. The presence of Coulomb diamonds in the spectroscopy confirms that Coulomb blockade governs transport across the QHI. Varying the microscope tip bias as well as current bias across the device, we uncover the QHI discrete energy spectrum arising from electronic confinement and we extract estimates of the gradient of the confining potential and of the edge state velocity. |
| first_indexed | 2024-03-12T16:53:57Z |
| format | Article |
| id | doaj.art-bbea906efe2b44ab8e8a7c709418fefc |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:53:57Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-bbea906efe2b44ab8e8a7c709418fefc2023-08-08T11:03:38ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115101304910.1088/1367-2630/15/1/013049Scanning gate spectroscopy of transport across a quantum Hall nano-islandF Martins0S Faniel1B Rosenow2M G Pala3H Sellier4S Huant5L Desplanque6X Wallart7V Bayot8B Hackens9Université catholique de Louvain , IMCN/NAPS, Louvain-la-Neuve, BelgiumUniversité catholique de Louvain , ICTEAM/ELEN, Louvain-la-Neuve, BelgiumInstitute for Theoretical Physics, Leipzig University , D-04009 Leipzig, GermanyIMEP-LAHC, Grenoble INP, Minatec, BP 257, F-38016 Grenoble, FranceInstitut Néel, CNRS and Université Joseph Fourier , BP 166, F-38042 Grenoble, FranceInstitut Néel, CNRS and Université Joseph Fourier , BP 166, F-38042 Grenoble, FranceIEMN, Cité Scientifique, BP 60069, F-59652 Villeneuve d'Ascq, FranceIEMN, Cité Scientifique, BP 60069, F-59652 Villeneuve d'Ascq, FranceUniversité catholique de Louvain , IMCN/NAPS, Louvain-la-Neuve, Belgium; Institut Néel, CNRS and Université Joseph Fourier , BP 166, F-38042 Grenoble, FranceUniversité catholique de Louvain , IMCN/NAPS, Louvain-la-Neuve, BelgiumWe explore transport across an ultra-small quantum Hall island (QHI) formed by closed quantum Hall edge states and connected to propagating edge channels through tunnel barriers. Scanning gate microscopy and scanning gate spectroscopy are used to first localize and then study a single QHI near a quantum point contact. The presence of Coulomb diamonds in the spectroscopy confirms that Coulomb blockade governs transport across the QHI. Varying the microscope tip bias as well as current bias across the device, we uncover the QHI discrete energy spectrum arising from electronic confinement and we extract estimates of the gradient of the confining potential and of the edge state velocity.https://doi.org/10.1088/1367-2630/15/1/013049 |
| spellingShingle | F Martins S Faniel B Rosenow M G Pala H Sellier S Huant L Desplanque X Wallart V Bayot B Hackens Scanning gate spectroscopy of transport across a quantum Hall nano-island New Journal of Physics |
| title | Scanning gate spectroscopy of transport across a quantum Hall nano-island |
| title_full | Scanning gate spectroscopy of transport across a quantum Hall nano-island |
| title_fullStr | Scanning gate spectroscopy of transport across a quantum Hall nano-island |
| title_full_unstemmed | Scanning gate spectroscopy of transport across a quantum Hall nano-island |
| title_short | Scanning gate spectroscopy of transport across a quantum Hall nano-island |
| title_sort | scanning gate spectroscopy of transport across a quantum hall nano island |
| url | https://doi.org/10.1088/1367-2630/15/1/013049 |
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