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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2307.06997 |
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| _version_ | 1866917276902490112 |
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| author | Zhang, Qixuan Lyu, Lingyuan Pancholi, Sneh Yan, Ziying Senaha, Trevor Zhang, Ruolun Wu, Chen Cao, Leonard W. Tresback, Jason Dai, Andrew Watanabe, Kenji Taniguchi, Takashi Parker, Daniel E. Allen, Monica T. |
| author_facet | Zhang, Qixuan Lyu, Lingyuan Pancholi, Sneh Yan, Ziying Senaha, Trevor Zhang, Ruolun Wu, Chen Cao, Leonard W. Tresback, Jason Dai, Andrew Watanabe, Kenji Taniguchi, Takashi Parker, Daniel E. Allen, Monica T. |
| contents | Moiré superlattices in stacked 2D crystals are powerful platforms for engineering correlated and topological quantum phases, with twisted graphene and transition metal dichalcogenides (TMDs) as prominent examples. Their angle-sensitive band structures enable rich tunability; however, conventional tear-and-stack methods fix the angle at assembly, limiting systematic exploration of angle-dependent phenomena. Here, we present a scanning-probe-based manipulation scheme that enables in situ, continuous post-fabrication twist control using nanostructured metal rotors. We demonstrate reproducible angle tuning and direct moiré imaging across three platforms: graphene, hBN, and encapsulated, air-sensitive MoTe2. Quantitative piezoresponse force microscopy (PFM) analysis confirms sub-degree precision with minimal induced heterostrain, preserving sample quality even in the marginally twisted regime. Crucially, the device architecture maintains open access to the active region, allowing optical, scanning-probe, and transport measurements. This work enables single-device mapping of the angular phase diagram of moiré materials, including the twisted TMD homobilayers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_06997 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Dynamic twisting and imaging of moiré crystals Zhang, Qixuan Lyu, Lingyuan Pancholi, Sneh Yan, Ziying Senaha, Trevor Zhang, Ruolun Wu, Chen Cao, Leonard W. Tresback, Jason Dai, Andrew Watanabe, Kenji Taniguchi, Takashi Parker, Daniel E. Allen, Monica T. Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons Moiré superlattices in stacked 2D crystals are powerful platforms for engineering correlated and topological quantum phases, with twisted graphene and transition metal dichalcogenides (TMDs) as prominent examples. Their angle-sensitive band structures enable rich tunability; however, conventional tear-and-stack methods fix the angle at assembly, limiting systematic exploration of angle-dependent phenomena. Here, we present a scanning-probe-based manipulation scheme that enables in situ, continuous post-fabrication twist control using nanostructured metal rotors. We demonstrate reproducible angle tuning and direct moiré imaging across three platforms: graphene, hBN, and encapsulated, air-sensitive MoTe2. Quantitative piezoresponse force microscopy (PFM) analysis confirms sub-degree precision with minimal induced heterostrain, preserving sample quality even in the marginally twisted regime. Crucially, the device architecture maintains open access to the active region, allowing optical, scanning-probe, and transport measurements. This work enables single-device mapping of the angular phase diagram of moiré materials, including the twisted TMD homobilayers. |
| title | Dynamic twisting and imaging of moiré crystals |
| topic | Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2307.06997 |