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Título

Chemical control over the energy-level alignment in a two-terminal junction

AutorLi, Yuan; Franco, Carlos ; Crivillers, Núria ; Mas Torrent, Marta ; Liang, Cao; Suchand Sangeeth, C.S.; Rovira, Concepció ; Veciana, Jaume ; Nijhuis, Christian A.
Palabras claveElectronic properties and materials
Physical chemistry
Superconductors
Fecha de publicación26-jul-2016
EditorNature Publishing Group
CitaciónNature Communications 7: 12066 (2016)
ResumenThe energy-level alignment of molecular transistors can be controlled by external gating to move molecular orbitals with respect to the Fermi levels of the source and drain electrodes. Two-terminal molecular tunnelling junctions, however, lack a gate electrode and suffer from Fermi-level pinning, making it difficult to control the energy-level alignment of the system. Here we report an enhancement of 2 orders of magnitude of the tunnelling current in a two-terminal junction via chemical molecular orbital control, changing chemically the molecular component between a stable radical and its non-radical form without altering the supramolecular structure of the junction. Our findings demonstrate that the energy-level alignment in self-assembled monolayer-based junctions can be regulated by purely chemical modifications, which seems an attractive alternative to control the electrical properties of two-terminal junctions.
Versión del editorhttp://dx.doi.org/10.1038/ncomms12066
URIhttp://hdl.handle.net/10261/148774
DOI10.1038/ncomms12066
ISSN2041-1723
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