Journal
NATURE COMMUNICATIONS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms11595
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Funding
- National Science Foundation (grants NSF-ECCS) [1402990, 1518863]
- National Research Foundation, Prime Minister's Office, Singapore under its Medium-Sized Centre programme
- NRF fellowship award [NRF-RF 2010-03]
- Singapore Ministry of Education (MOE) [MOE2015-T2-1-050]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1402990] Funding Source: National Science Foundation
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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.
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