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| Format: | Preprint |
| Veröffentlicht: |
2024
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| Online-Zugang: | https://arxiv.org/abs/2404.17738 |
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| _version_ | 1866910576066691072 |
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| author | Gudarzi, Mohsen Moazzami Slizovskiy, Sergey Mao, Boyang Tóvári, Endre Pinter, Gergo Sanderson, David Asaad, Maryana Xiang, Ying Wang, Zhiyuan Guo, Jianqiang Spencer, Ben F. Geim, Alexandra A. Fal'ko, Vladimir I. Kretinin, Andrey V. |
| author_facet | Gudarzi, Mohsen Moazzami Slizovskiy, Sergey Mao, Boyang Tóvári, Endre Pinter, Gergo Sanderson, David Asaad, Maryana Xiang, Ying Wang, Zhiyuan Guo, Jianqiang Spencer, Ben F. Geim, Alexandra A. Fal'ko, Vladimir I. Kretinin, Andrey V. |
| contents | Understanding and controlling the electrical properties of solution-processed 2D materials is key to further printed electronics progress. Here we demonstrate that the thermolysis of the aromatic intercalants utilized in nanosheet exfoliation for graphene laminates opens the route to achieving high intrinsic mobility and simultaneously controlling doping type ($n$- and $p$-) and concentration over a wide range. We establish that the intra-flake mobility is high by observing a linear magnetoresistance of such solution-processed graphene laminates and using it to devolve the inter-flake tunneling and intra-layer magnetotransport. Consequently, we determine the temperature dependences of the inter- and intra-layer characteristics, which both appear to be dominated by phonon-assisted processes at temperature $T>$20 Kelvin. In particular, we identify the efficiency of phonon-assisted tunneling as the main limiting factor for electrical conductivity in graphene laminates at room temperature. We also demonstrate a thermoelectric sensitivity of around 50 $μ$V K$^{-1}$ in a solution-processed metal-free graphene-based thermocouple. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_17738 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultimate charge transport regimes in doping-controlled graphene laminates: phonon-assisted processes revealed by the linear magnetoresistance Gudarzi, Mohsen Moazzami Slizovskiy, Sergey Mao, Boyang Tóvári, Endre Pinter, Gergo Sanderson, David Asaad, Maryana Xiang, Ying Wang, Zhiyuan Guo, Jianqiang Spencer, Ben F. Geim, Alexandra A. Fal'ko, Vladimir I. Kretinin, Andrey V. Mesoscale and Nanoscale Physics Materials Science Understanding and controlling the electrical properties of solution-processed 2D materials is key to further printed electronics progress. Here we demonstrate that the thermolysis of the aromatic intercalants utilized in nanosheet exfoliation for graphene laminates opens the route to achieving high intrinsic mobility and simultaneously controlling doping type ($n$- and $p$-) and concentration over a wide range. We establish that the intra-flake mobility is high by observing a linear magnetoresistance of such solution-processed graphene laminates and using it to devolve the inter-flake tunneling and intra-layer magnetotransport. Consequently, we determine the temperature dependences of the inter- and intra-layer characteristics, which both appear to be dominated by phonon-assisted processes at temperature $T>$20 Kelvin. In particular, we identify the efficiency of phonon-assisted tunneling as the main limiting factor for electrical conductivity in graphene laminates at room temperature. We also demonstrate a thermoelectric sensitivity of around 50 $μ$V K$^{-1}$ in a solution-processed metal-free graphene-based thermocouple. |
| title | Ultimate charge transport regimes in doping-controlled graphene laminates: phonon-assisted processes revealed by the linear magnetoresistance |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2404.17738 |