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Title: Electrostatic control over temperature-dependent tunnelling across a single-molecule junction
Authors: Garrigues, A.R
Wang, L 
Del Barco, E
Nijhuis, C.A 
Keywords: ferrocene
Coulomb criterion
electric field
electronic equipment
electric potential
electron transport
mathematical analysis
mathematical model
molecular electronics
temperature dependence
Issue Date: 2016
Publisher: Nature Publishing Group
Citation: Garrigues, A.R, Wang, L, Del Barco, E, Nijhuis, C.A (2016). Electrostatic control over temperature-dependent tunnelling across a single-molecule junction. Nature Communications 7 : 11595. ScholarBank@NUS Repository.
Abstract: Understanding how the mechanism of charge transport through molecular tunnel junctions depends on temperature is crucial to control electronic function in molecular electronic devices. With just a few systems investigated as a function of bias and temperature so far, thermal effects in molecular tunnel junctions remain poorly understood. Here we report a detailed charge transport study of an individual redox-active ferrocene-based molecule over a wide range of temperatures and applied potentials. The results show the temperature dependence of the current to vary strongly as a function of the gate voltage. Specifically, the current across the molecule exponentially increases in the Coulomb blockade regime and decreases at the charge degeneracy points, while remaining temperature-independent at resonance. Our observations can be well accounted for by a formal single-level tunnelling model where the temperature dependence relies on the thermal broadening of the Fermi distributions of the electrons in the leads.
Source Title: Nature Communications
ISSN: 20411723
DOI: 10.1038/ncomms11595
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