Rectification effects in coherent transport through single molecules
Florian Pump, Gianaurelio Cuniberti
TL;DR
This paper presents a minimal theoretical model for coherent electron transport in donor-acceptor molecular junctions, demonstrating current rectification effects under strong electrode coupling and relating findings to recent experimental observations.
Contribution
It introduces a simplified model capturing rectification in molecular junctions, highlighting the role of intramolecular barriers and strong electrode coupling.
Findings
Current rectification occurs with bias polarity reversal.
The model aligns with recent experimental molecular rectification data.
Strong electrode coupling enhances rectification effects.
Abstract
A minimal model for coherent transport through a donor/acceptor molecular junction is presented. The two donor and acceptor sites are described by single levels energetically separated by an intramolecular tunnel barrier. In the limit of strong coupling to the electrodes a current rectification for different bias voltage polarities occurs. Contacts with recent experiments of molecular rectification are also given.
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