Graphene Straintronics by Molecular Trapping
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | |
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| _version_ | 1866916659173785600 |
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| author | Srivastava, Pawan Kumar Khandelwal, Vedanki Reddy, Ramesh Tarafder, Kartick Ghosh, Subhasis |
| author_facet | Srivastava, Pawan Kumar Khandelwal, Vedanki Reddy, Ramesh Tarafder, Kartick Ghosh, Subhasis |
| contents | Here, we report on controlling strain in graphene by trapping molecules at the graphene-substrate interface, leveraging molecular dipole moments. Spectroscopic and transport measurements show that strain correlates with the dipole moments of trapped molecules, with a dipole range of 1.5 D to 4.9 D resulting in a 50-fold increase in strain and a substantial rise in the residual carrier density. This has been possible by charge transfer between graphene and trapped molecules, altering the C=C bond length, and causing biaxial strain. First-principles density functional theory calculations confirm a consistent dependence of bending height on molecular dipole moments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_17240 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Graphene Straintronics by Molecular Trapping Srivastava, Pawan Kumar Khandelwal, Vedanki Reddy, Ramesh Tarafder, Kartick Ghosh, Subhasis Mesoscale and Nanoscale Physics Applied Physics Here, we report on controlling strain in graphene by trapping molecules at the graphene-substrate interface, leveraging molecular dipole moments. Spectroscopic and transport measurements show that strain correlates with the dipole moments of trapped molecules, with a dipole range of 1.5 D to 4.9 D resulting in a 50-fold increase in strain and a substantial rise in the residual carrier density. This has been possible by charge transfer between graphene and trapped molecules, altering the C=C bond length, and causing biaxial strain. First-principles density functional theory calculations confirm a consistent dependence of bending height on molecular dipole moments. |
| title | Graphene Straintronics by Molecular Trapping |
| topic | Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2503.17240 |