Breakdown of Ohm’s law in molecular junctions with electrodes of single-layer graphene
For sufficiently low biases, Ohm’s law, the cornerstone of electricity, stating that current I and voltage V are proportional, is satisfied at low biases for all known systems ranging from macroscopic conductors to nanojunctions. In this study, we predict theoretically and demonstrate experimentally...
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| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
28 March 2024
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| In: |
The journal of physical chemistry letters
Year: 2024, Jahrgang: 15, Heft: 12, Pages: 3267-3275 |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/acs.jpclett.4c00387 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/acs.jpclett.4c00387
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| Verfasserangaben: | Ioan Bâldea, Yuhong Chen, Miao Zhang, Na Xin, Yunxia Feng, Jiajun Feng, Chuancheng Jia, Xuefeng Guo, and Zuoti Xie |
| Zusammenfassung: | For sufficiently low biases, Ohm’s law, the cornerstone of electricity, stating that current I and voltage V are proportional, is satisfied at low biases for all known systems ranging from macroscopic conductors to nanojunctions. In this study, we predict theoretically and demonstrate experimentally that in single-molecule junctions fabricated with single-layer graphene as electrodes the current at low V scales as the cube of V, thereby invalidating Ohm’s law. The absence of the ohmic regime is a direct consequence of the unique band structure of the single-layer graphene, whose vanishing density of states at the Dirac points precludes electron transfer from and to the electrodes at low biases. |
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| Beschreibung: | Online veröffentlicht: 15. März 2024 Gesehen am 16.08.2024 |
| Beschreibung: | Online Resource |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/acs.jpclett.4c00387 |