Identification of vibration modes in single-molecule junctions by strong inelastic signals in noise
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Título: | Identification of vibration modes in single-molecule junctions by strong inelastic signals in noise |
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Autor/es: | Tewari, Sumit | Sabater, Carlos | Ruitenbeek, J.M. van |
Grupo/s de investigación o GITE: | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Vibration modes | Single-molecule junctions | Strong inelastic signals | Noise |
Área/s de conocimiento: | Física Aplicada |
Fecha de publicación: | 6-sep-2019 |
Editor: | Royal Society of Chemistry |
Cita bibliográfica: | Nanoscale. 2019,11: 19462-19467. doi:10.1039/C9NR05774A |
Resumen: | Conductance measurements in single-molecule junctions (SMJs) are on many occasions accompanied by inelastic spectroscopy and shot-noise measurements in order to obtain information about different vibration modes (or vibrons) and channels involved in the transport respectively. We have extended the single-molecule shot-noise measurements, which were previously performed at low bias, to high bias and we have studied the effects of these vibrons on the noise for a Deuterium (D2) molecule between Pt leads. We report here two important findings from these measurements. First, we find in our noise measurements that at the vibron energies of the molecule, a two-level fluctuation (TLF) is excited in the junction. Second, we show that in the presence of this TLF, a form of enhanced noise spectroscopy can be performed to detect inelastic electron–vibron interactions, by studying the third derivative of the noise (d3SI/dV3). This is possible because TLFs are insensitive to elastic scattering of electrons from defects, which nevertheless leave their signature in the usual inelastic electron tunnelling spectroscopy (IETS) measurements. |
Patrocinador/es: | This work was supported by the Netherlands Organization for Scientific Research (NWO/OCW), as part of the Frontiers of Nanoscience program with grant number NF13SAP09. |
URI: | http://hdl.handle.net/10045/98112 |
ISSN: | 2040-3364 (Print) | 2040-3372 (Online) |
DOI: | 10.1039/C9NR05774A |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1039/C9NR05774A |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
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