Hexatic Phase in Covalent Two-Dimensional Silver Iodide
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arXiv
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| Format: | Preprint |
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2025
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| author | Bui, Thuy An Lamprecht, David Madsen, Jacob Kurpas, Marcin Kotrusz, Peter Markevich, Alexander Mangler, Clemens Kotakoski, Jani Filipovic, Lado Meyer, Jannik C. Pennycook, Timothy J. Skakalova, Viera Mustonen, Kimmo |
| author_facet | Bui, Thuy An Lamprecht, David Madsen, Jacob Kurpas, Marcin Kotrusz, Peter Markevich, Alexander Mangler, Clemens Kotakoski, Jani Filipovic, Lado Meyer, Jannik C. Pennycook, Timothy J. Skakalova, Viera Mustonen, Kimmo |
| contents | According to the Kosterlitz-Thouless-Halperin-Nelson-Young (KTHNY) theory, the transition from a solid to liquid in two dimensions proceeds through an orientationally ordered liquid-like hexatic phase. However, alternative mixed melting scenarios, in which melting proceeds through the hexatic phase with both continuous and discontinuous transitions, have also been observed in some two-dimensional systems. In this study, we imaged silver iodide embedded in multilayer graphene using time- and temperature-resolved in situ atomic-resolution scanning transmission electron microscopy and nanobeam electron diffraction. We observed the hexatic phase and provide evidence supporting a mixed melting scenario. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_05759 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hexatic Phase in Covalent Two-Dimensional Silver Iodide Bui, Thuy An Lamprecht, David Madsen, Jacob Kurpas, Marcin Kotrusz, Peter Markevich, Alexander Mangler, Clemens Kotakoski, Jani Filipovic, Lado Meyer, Jannik C. Pennycook, Timothy J. Skakalova, Viera Mustonen, Kimmo Materials Science Disordered Systems and Neural Networks According to the Kosterlitz-Thouless-Halperin-Nelson-Young (KTHNY) theory, the transition from a solid to liquid in two dimensions proceeds through an orientationally ordered liquid-like hexatic phase. However, alternative mixed melting scenarios, in which melting proceeds through the hexatic phase with both continuous and discontinuous transitions, have also been observed in some two-dimensional systems. In this study, we imaged silver iodide embedded in multilayer graphene using time- and temperature-resolved in situ atomic-resolution scanning transmission electron microscopy and nanobeam electron diffraction. We observed the hexatic phase and provide evidence supporting a mixed melting scenario. |
| title | Hexatic Phase in Covalent Two-Dimensional Silver Iodide |
| topic | Materials Science Disordered Systems and Neural Networks |
| url | https://arxiv.org/abs/2501.05759 |