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arXiv · 1409.3090

Multipeak Negative Differential Resistance from Interplay between Nonlinear Stark Effect and Double-Branch Current Flow

Mikolaj Sadek·Malgorzata Wierzbowska·Michal F. Rode·Andrzej L. Sobolewski
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Abstract

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. 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.

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Mikolaj Sadek, Malgorzata Wierzbowska, Michal F. Rode, Andrzej L. Sobolewski. 2014-09-10. Multipeak Negative Differential Resistance from Interplay between Nonlinear Stark Effect and Double-Branch Current Flow. https://doi.org/10.1039/c4ra10720a

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