Multipeak negative differential resistance from interplay between nonlinear stark effect and double-branch current flow

Multipeak negative differential resistance (NDR) molecular devices are designed from first principles. The effect of NDR is associated with the non-linear Stark shifts and the electron localization within the conductive region and contacts. A deep I ( V )-curve well is formed when the aromatic molec...

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Bibliographic Details
Published in:RSC advances 2014-01, Vol.4 (95), p.52933-52939
Main Authors: Sadek, Miko aj, Wierzbowska, Ma gorzata, Rode, Micha F, Sobolewski, Andrzej L
Format: Article
Language:English
Subjects:
Electric potential
Flats
Hydrogen bonds
Localization
Nonlinearity
Oscillations
Stark effect
Voltage
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Summary:Multipeak negative differential resistance (NDR) molecular devices are designed from first principles. The effect of NDR is associated with the non-linear Stark shifts and the electron localization within the conductive region and contacts. A deep I ( V )-curve well is formed when the aromatic molecule, containing intramolecular hydrogen bond, is connected to each lead by the double-branch contacts. This effect occurs at the same voltage where a single-junction case exhibits only a flat step in the current characteristics. The multipeak oscillations arise from the mutual effect of the Stark shifts located at the electron-rich contacts and parts of the molecule - this opens the route for further tailoring the desired properties. Multipeak negative differential resistance (NDR) molecular devices are designed from first principles.
ISSN:2046-2069
2046-2069
DOI:10.1039/c4ra10720a