Nanoscale ferroelectric programming of van der Waals heterostructures
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917303665295360 |
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| author | Yang, Dengyu Cao, Qingrui Akyuz, Erin Hayden, John Nordlander, Josh Yu, Muqing Ramachandran, Ranjani Irvin, Patrick Maria, Jon-Paul Hunt, Benjamin M. Levy, Jeremy |
| author_facet | Yang, Dengyu Cao, Qingrui Akyuz, Erin Hayden, John Nordlander, Josh Yu, Muqing Ramachandran, Ranjani Irvin, Patrick Maria, Jon-Paul Hunt, Benjamin M. Levy, Jeremy |
| contents | The ability to create superlattices in van der Waals (vdW) heterostructures via moiré interference heralded a new era in the science and technology of two-dimensional materials. Through precise control of the twist angle, flat bands and strongly correlated phases have been engineered. The precise twisting of vdW layers is in some sense a bottom-up approach--a single parameter can dial in a wide range of periodic structures. Here, we describe a top-down approach to engineering nanoscale potentials in vdW layers using a buried programmable ferroelectric layer. Ultra-low-voltage electron beam lithography (ULV-EBL) is used to program ferroelectric domains in a ferroelectric Al_{1-x}B_{x}N thin film through a graphene/hexagonal boron nitride (hBN) heterostructure that is transferred on top. We demonstrate ferroelectric field effects by creating a lateral p-n junction, and demonstrate spatial resolution down to 35 nm, limited by the resolution of our scanned probe characterization methods. This innovative, resist-free patterning method is predicted to achieve 10 nm resolution and enable arbitrary programming of vdW layers, opening a pathway to create new phases that are inaccessible by moiré techniques. The ability to "paint" different phases of matter on a single vdW "canvas" provides a wealth of new electronic and photonic functionalities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_12757 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Nanoscale ferroelectric programming of van der Waals heterostructures Yang, Dengyu Cao, Qingrui Akyuz, Erin Hayden, John Nordlander, Josh Yu, Muqing Ramachandran, Ranjani Irvin, Patrick Maria, Jon-Paul Hunt, Benjamin M. Levy, Jeremy Materials Science Mesoscale and Nanoscale Physics Applied Physics The ability to create superlattices in van der Waals (vdW) heterostructures via moiré interference heralded a new era in the science and technology of two-dimensional materials. Through precise control of the twist angle, flat bands and strongly correlated phases have been engineered. The precise twisting of vdW layers is in some sense a bottom-up approach--a single parameter can dial in a wide range of periodic structures. Here, we describe a top-down approach to engineering nanoscale potentials in vdW layers using a buried programmable ferroelectric layer. Ultra-low-voltage electron beam lithography (ULV-EBL) is used to program ferroelectric domains in a ferroelectric Al_{1-x}B_{x}N thin film through a graphene/hexagonal boron nitride (hBN) heterostructure that is transferred on top. We demonstrate ferroelectric field effects by creating a lateral p-n junction, and demonstrate spatial resolution down to 35 nm, limited by the resolution of our scanned probe characterization methods. This innovative, resist-free patterning method is predicted to achieve 10 nm resolution and enable arbitrary programming of vdW layers, opening a pathway to create new phases that are inaccessible by moiré techniques. The ability to "paint" different phases of matter on a single vdW "canvas" provides a wealth of new electronic and photonic functionalities. |
| title | Nanoscale ferroelectric programming of van der Waals heterostructures |
| topic | Materials Science Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2407.12757 |