Dynamic tunneling junctions at the atomic intersection of two twisted graphene edges
| Autor: | Sasha Vrbica, Kirsten N. Kanneworff, Amedeo Bellunato, Remko Fermin, F. Galli, Carlos Sabater, Erik W. de Vos, Jan M. van Ruitenbeek, Grégory F. Schneider |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Letter
Fabrication Materials science molecular electronics graphene edges tunneling junction Bioengineering molecular break junction 02 engineering and technology Edge (geometry) 010402 general chemistry 01 natural sciences law.invention Intersection law Condensed Matter::Superconductivity Molecule General Materials Science Quantum tunnelling Graphene business.industry Mechanical Engineering Molecular electronics General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electrode Optoelectronics 0210 nano-technology business nanogap |
| Zdroj: | Nano Letters Nano Letters, 18(4), 2505-2510 |
| Popis: | The investigation of the transport properties of single molecules by flowing tunneling currents across extremely narrow gaps is relevant for challenges as diverse as the development of molecular electronics and sequencing of DNA. The achievement of well-defined electrode architectures remains a technical challenge, especially due to the necessity of high precision fabrication processes and the chemical instability of most bulk metals. Here, we illustrate a continuously adjustable tunneling junction between the edges of two twisted graphene sheets. The unique property of the graphene electrodes is that the sheets are rigidly supported all the way to the atomic edge. By analyzing the tunneling current characteristics, we also demonstrate that the spacing across the gap junction can be controllably adjusted. Finally, we demonstrate the transition from the tunneling regime to contact and the formation of an atomic-sized junction between the two edges of graphene. |
| Databáze: | OpenAIRE |
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