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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2503.07186 |
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| _version_ | 1866915189736079360 |
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| author | Galafassi, Riccardo Vialla, Fabien Rajaji, V. Forestier, Alexis Araújo, Bruno Sousa Diaf, Hatem Del Fatti, Natalia Filho, Antonio Gomes Souza Claudel, Arnaud Marty, Laëtitia San-Miguel, Alfonso |
| author_facet | Galafassi, Riccardo Vialla, Fabien Rajaji, V. Forestier, Alexis Araújo, Bruno Sousa Diaf, Hatem Del Fatti, Natalia Filho, Antonio Gomes Souza Claudel, Arnaud Marty, Laëtitia San-Miguel, Alfonso |
| contents | Due to their unique dimensionality, the physical properties of two-dimensional materials are deeply impacted by their surroundings, calling for a thorough understanding and control of these effects. We investigated the influence of the substrate and the pressure transmitting medium on bilayer graphene in a unique high-pressure environment where the sample is partially suspended and partially supported. By employing Raman spectroscopy with a sub-micron spatial resolution, we explored the evolution of strain and doping, and demonstrated that they are both similarly induced in the suspended and supported regions of the bilayer graphene within the studied pressure range. Almost full strain and doping transfer between the supported and suspended regions is concluded. We observed that charge carrier density saturates quickly at low pressures (2 GPa) while biaxial strain continuously increases with pressure. Additionally, Raman spatial mapping highlights a rather uniform doping and strain distribution, yet with significant local variations revealing a more complex scenario than previously documented by single-point studies at high pressure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_07186 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Strain and doping transfer between suspended and supported bilayer graphene Galafassi, Riccardo Vialla, Fabien Rajaji, V. Forestier, Alexis Araújo, Bruno Sousa Diaf, Hatem Del Fatti, Natalia Filho, Antonio Gomes Souza Claudel, Arnaud Marty, Laëtitia San-Miguel, Alfonso Mesoscale and Nanoscale Physics Due to their unique dimensionality, the physical properties of two-dimensional materials are deeply impacted by their surroundings, calling for a thorough understanding and control of these effects. We investigated the influence of the substrate and the pressure transmitting medium on bilayer graphene in a unique high-pressure environment where the sample is partially suspended and partially supported. By employing Raman spectroscopy with a sub-micron spatial resolution, we explored the evolution of strain and doping, and demonstrated that they are both similarly induced in the suspended and supported regions of the bilayer graphene within the studied pressure range. Almost full strain and doping transfer between the supported and suspended regions is concluded. We observed that charge carrier density saturates quickly at low pressures (2 GPa) while biaxial strain continuously increases with pressure. Additionally, Raman spatial mapping highlights a rather uniform doping and strain distribution, yet with significant local variations revealing a more complex scenario than previously documented by single-point studies at high pressure. |
| title | Strain and doping transfer between suspended and supported bilayer graphene |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2503.07186 |