Article Title
Cotunneling transport in ultra-narrow gold nanowire bundles
Authors
Anas Loubat, Laboratoire National des Champs Magnétiques Intenses, CNRS-INSA-UJF-UPS, UPR3228; 143 avenue de Rangueil, F-31400 Toulouse, France
Université de Toulouse, INSA, UPS, LPCNO (Laboratoire de Physique et Chimie des Nano-Objets), F-31077 Toulouse, France; CNRS; UMR5215; LPCNO, F-31077 Toulouse, France
Walter Escoffier, Laboratoire National des Champs Magnétiques Intenses, CNRS-INSA-UJF-UPS, UPR3228; 143 avenue de Rangueil, F-31400 Toulouse, France
Lise-Marie Lacroix, Université de Toulouse, INSA, UPS, LPCNO (Laboratoire de Physique et Chimie des Nano-Objets), F-31077 Toulouse, France; CNRS; UMR5215; LPCNO, F-31077 Toulouse, France
Guillaume Viau, Université de Toulouse, INSA, UPS, LPCNO (Laboratoire de Physique et Chimie des Nano-Objets), F-31077 Toulouse, France; CNRS; UMR5215; LPCNO, F-31077 Toulouse, France
Reasmey Tan, Université de Toulouse, INSA, UPS, LPCNO (Laboratoire de Physique et Chimie des Nano-Objets), F-31077 Toulouse, France; CNRS; UMR5215; LPCNO, F-31077 Toulouse, France
Julian Carrey, Université de Toulouse, INSA, UPS, LPCNO (Laboratoire de Physique et Chimie des Nano-Objets), F-31077 Toulouse, France; CNRS; UMR5215; LPCNO, F-31077 Toulouse, France
Bénédicte Warot-Fonrose, Centre d’Elaboration de Matériaux et d’Etudes Structurales, CNRS, 29 rue Jeanne Marvig, F-31077 Toulouse, France
Bertrand Raquet, Laboratoire National des Champs Magnétiques Intenses, CNRS-INSA-UJF-UPS, UPR3228; 143 avenue de Rangueil, F-31400 Toulouse, France
Keywords
ultra-narrow gold nanowires, 1D nano-objects, electronic transport, variable cotunneling, Coulomb blockade
Abstract
We investigate the charge transport in close-packed ultra-narrow (1.5 nm diameter) gold nanowires stabilized by oleylamine ligands. We give evidence of charging effects in the weakly coupled one-dimensional (1D) nanowires, monitored by the temperature and the bias voltage. At low temperature, in the Coulomb blockade regime, the current flow reveals an original cooperative multi-hopping process between 1D-segments of Au-NWs, minimising the charging energy cost. Above the Coulomb blockade threshold voltage and at high temperature, the charge transport evolves into a sequential tunneling regime between the nearestnanowires. Our analysis shows that the effective length of the Au-NWs inside the bundle is similar to the 1D localisation length of the electronic wave function (of the order of 120 nm ± 20 nm), but almost two orders of magnitude larger than the diameter of the nanowire. This result confirms the high structural quality of the Au-NW segments.
Graphical Abstract
Publisher
Tsinghua University Press
Recommended Citation
Anaïs Loubat,Walter Escoffier,Lise-Marie Lacroix,Guillaume Viau,Reasmey Tan,Julian Carrey,Bénédicte Warot-Fonrose,Bertrand Raquet, Cotunneling transport in ultra-narrow gold nanowire bundles. NanoRes.2013, 6(9): 644–651
