Mechanically-reconfigurable van der Waals devices via low-friction gold sliding
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2022
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| _version_ | 1866911982411579392 |
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| author | Barabas, Andrew Z. Sequeira, Ian Yang, Yuhui Barajas-Aguilar, Aaron H. Taniguchi, Takashi Watanabe, Kenji Sanchez-Yamagishi, Javier D. |
| author_facet | Barabas, Andrew Z. Sequeira, Ian Yang, Yuhui Barajas-Aguilar, Aaron H. Taniguchi, Takashi Watanabe, Kenji Sanchez-Yamagishi, Javier D. |
| contents | Interfaces of van der Waals (vdW) materials such as graphite and hexagonal boron nitride (hBN) exhibit low-friction sliding due to their atomically-flat surfaces and weak vdW bonding. We demonstrate that microfabricated gold also slides with low friction on hBN. This enables the arbitrary post-fabrication repositioning of device features both at ambient conditions as well as in-situ to a measurement cryostat. We demonstrate mechanically-reconfigurable vdW devices where device geometry and position are continuously-tunable parameters. By fabricating slidable top gates on a graphene-hBN device, we produce a mechanically-tunable quantum point contact where electron confinement and edge-state coupling can be continuously modified. Moreover, we combine in-situ sliding with simultaneous electronic measurements to create new types of scanning probe experiments, where gate electrodes and even entire vdW heterostructures devices can be spatially scanned by sliding across a target. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2212_02536 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Mechanically-reconfigurable van der Waals devices via low-friction gold sliding Barabas, Andrew Z. Sequeira, Ian Yang, Yuhui Barajas-Aguilar, Aaron H. Taniguchi, Takashi Watanabe, Kenji Sanchez-Yamagishi, Javier D. Mesoscale and Nanoscale Physics Interfaces of van der Waals (vdW) materials such as graphite and hexagonal boron nitride (hBN) exhibit low-friction sliding due to their atomically-flat surfaces and weak vdW bonding. We demonstrate that microfabricated gold also slides with low friction on hBN. This enables the arbitrary post-fabrication repositioning of device features both at ambient conditions as well as in-situ to a measurement cryostat. We demonstrate mechanically-reconfigurable vdW devices where device geometry and position are continuously-tunable parameters. By fabricating slidable top gates on a graphene-hBN device, we produce a mechanically-tunable quantum point contact where electron confinement and edge-state coupling can be continuously modified. Moreover, we combine in-situ sliding with simultaneous electronic measurements to create new types of scanning probe experiments, where gate electrodes and even entire vdW heterostructures devices can be spatially scanned by sliding across a target. |
| title | Mechanically-reconfigurable van der Waals devices via low-friction gold sliding |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2212.02536 |