Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 51: Molecular Electronics and Photonics (joint session TT/CPP)

TT 51.2: Vortrag

Mittwoch, 18. März 2020, 18:15–18:30, HSZ 304

Low temperature single molecule transport measurements on fullerenes — •Alexander Strobel1,2, Filip Kilibarda1,2, Elke Scheer2, and Artur Erbe1,21Helmhotz Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 2University of Konstanz, Faculty of sciences, 78457 Konstanz, Germany

Molecular electronics offers a novel approach, for scaling traditional 3D electronics down to nanoscale dimensions in a quasi 1D system. This approach offers a deeper understanding of the electron transport behavior of molecules. Our research focuses on classifying different molecules with the help of Mechanically Controlled Break Junction (MCBJ) technique. Here we report electrical transport properties of fullerene molecules using a MCBJ setup. Fullerenes with their high stability and symmetry have become reference molecules for the development of measurement routines for molecular electronics applications. Our MCBJ setup enables us to evaporate C60 in situ and measure electrical characteristics under high vacuum conditions. Furthermore, low-temperature measurements down to 6 K are possible. Conductance histograms are recorded to measure the preferred conductance values of single C60 molecules. I-V curves, the differential conductance and inelastic electron tunneling spectra (IETS) are directly and simultaneously measured using lock-in measurement methods. IETS measurements are used to investigate electron-phonon Interactions. The experimental analysis of the charge transport by varying the electrode distance, the bias potential and the electrode metal at different conductance is presented.

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