Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 74: Molecular Electronics and Photonics
TT 74.1: Vortrag
Mittwoch, 14. März 2018, 16:00–16:15, H 3005
Unimolecular NAND logic gate with input by single Au atoms — •Dmitry Skidin1, Justus Krüger1, Frank Eisenhut1, Andre Gourdon2, Gianaurelio Cuniberti1,3, Christian Joachim2, and Francesca Moresco1 — 1Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden, 01069 Dresden, Germany — 2CEMES, CNRS, 29 rue J. Marvig, 31055 Toulouse Cedex, France — 3Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01069 Dresden, Germany
Design and fabrication of nanoscale functional electronic units remains a main task of molecular electronics. In this study, we combine on-surface synthesis approach with STM manipulation techniques to create a unimolecular NAND logic gate. For this purpose, we use asymmetric starphene, which has a characteristic Y-shape, but with the two branches being one phenyl ring longer than the other one. It is obtained by surface-assisted cyclodehydrogenation on Au(111). As predicted by theoretical calculations, local perturbations of the longer branches (which serve as an input) lead to the electronic changes on the shorter branch (output). The perturbations are provided by the interaction with the single Au atoms created on the surface. Scanning tunneling spectroscopy signal showing the position of the molecular resonance is used as an output. Thus, by carefully bringing the single Au atoms into interaction with the molecule, we induce the shifts of the resonant state in a way that replicates the Boolean truth table of a NAND logic gate.