[Zurück]

R. Stadler, X. Zhao, V. Geskin:
"Destructive quantum interference in electron transport: A reconciliation of the molecular orbital and the atomic orbital perspective";
Hauptvortrag: Workshop "Many paths to interference: a journey between quantum dots and single molecule junctions", Max Planck Institute for the Physics of Complex Systems, Dresden, Germany (eingeladen); 18.04.2017 - 20.04.2017.

Since the concepts for the implementation of data storage and logic gates used in conventional electronics cannot be simply downscaled to the level of single molecule devices, new architectural paradigms are needed, where quantum interference (QI) effects are likely to provide an useful starting point. In order to be able to use QI for design purposes in single molecule electronics, the relation between their occurrence and molecular structure has to be understood at such a level that simple guidelines for electrical engineering can be established. We made a big step towards this aim by developing a graphical scheme that allows for the prediction of the occurrence or absence of QI induced minima in the transmission function and the derivation of this method and the range of its applicability will form the first part of this presentation [1],[2],[3]. In the second part the scheme will be contrasted with a molecular orbital perspective on understanding and predicting QI effects, which was derived from the Coulson-Rushbrooke pairing theorem in quantum chemistry [4]. [1] R. Stadler, S. Ami, M. Forshaw, and C. Joachim, Nanotechnology 15, S115-S121 (2004). [2] T. Markussen, R. Stadler, K. S. Thygesen, Nano Lett. 10, 4260-4265 (2010). [3] R. Stadler, Nano Lett., 15, 7175-7176 (2015). [4] X. Zhao, V. Geskin and R. Stadler, accepted for publication in a special issue on "Frontiers in Molecular Scale Electronics" of J. Chem. Phys. (2017); http://arxiv.org/abs/1612.02266

Molecular electronics, conductance of molecular nanojunctions, quantum interference effects

Projektleitung Robert Stadler:
Elektrochemische Interferenz