Easy-to-configure zero-dimensional valley-chiral modes in a graphene point junction
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913294978121728 |
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| author | Davydov, Konstantin Zhang, Xi Ren, Wei Coles, Matthew Kline, Logan Zucker, Bryan Watanabe, Kenji Taniguchi, Takashi Wang, Ke |
| author_facet | Davydov, Konstantin Zhang, Xi Ren, Wei Coles, Matthew Kline, Logan Zucker, Bryan Watanabe, Kenji Taniguchi, Takashi Wang, Ke |
| contents | The valley degree of freedom in 2D materials can be manipulated for low-dissipation quantum electronics called valleytronics. At the boundary between two regions of bilayer graphene with different atomic or electrostatic configuration, valley-polarized current has been realized. However, the demanding fabrication and operation requirements limit device reproducibility and scalability toward more advanced valleytronics circuits. We demonstrate a new device architecture of a point junction where a valley-chiral 0D PN junction is easily configured, switchable, and capable of carrying valley current with an estimated polarization of ~80%. This work provides a new building block in manipulating valley quantum numbers and scalable valleytronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_01027 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Easy-to-configure zero-dimensional valley-chiral modes in a graphene point junction Davydov, Konstantin Zhang, Xi Ren, Wei Coles, Matthew Kline, Logan Zucker, Bryan Watanabe, Kenji Taniguchi, Takashi Wang, Ke Mesoscale and Nanoscale Physics The valley degree of freedom in 2D materials can be manipulated for low-dissipation quantum electronics called valleytronics. At the boundary between two regions of bilayer graphene with different atomic or electrostatic configuration, valley-polarized current has been realized. However, the demanding fabrication and operation requirements limit device reproducibility and scalability toward more advanced valleytronics circuits. We demonstrate a new device architecture of a point junction where a valley-chiral 0D PN junction is easily configured, switchable, and capable of carrying valley current with an estimated polarization of ~80%. This work provides a new building block in manipulating valley quantum numbers and scalable valleytronics. |
| title | Easy-to-configure zero-dimensional valley-chiral modes in a graphene point junction |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2404.01027 |