Anomalous Temperature Dependent Transport through Single Colloidal Nanorods Strongly Coupled to Metallic Leads

摘要: We report wiring of individual colloidal nanorods (NRs), 30−60 nm long by 3.5−5 diameter. Strong electrical coupling is achieved electron beam induced deposition (EBID) metallic lines targeting NR tips with nanometric precision. At T = 4 K many devices exhibit smooth I(V) curves no sharp onset features, which remarkably fit a Fowler−Nordheim tunneling model. All an anomalous exponential temperature dependence the form I ∼ exp(T/T0). This irregular behavior cannot be explained any hopping or activation model and interpreted accounting for lowering conduction band due to lattice dilation phonon coupling.