Regensburg 2019 – scientific programme

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DS: Fachverband Dünne Schichten

DS 14: Poster

DS 14.39: Poster

Tuesday, April 2, 2019, 17:00–20:00, Poster E

A sqeezable tunneling junction setup for the measurement of thermoelectricity in nanojunctions — •Matthias Popp and Heiko B. Weber — Friedrich-Alexander-Universität Erlangen-Nürnberg

Motivated by experiments on epitaxial graphene-graphene nanojunctions [Kis17] we built a setup which is capable of adjusting the distance between two silicon carbide (SiC) plates on the picometer scale. Thereby we can bring electrodes which are patterned on top of the SiC plates into close vicinity. By adjusting the distance between the plates we can adjust the (tunneling) resistance of the so formed nanocontact within a wide range. The observed stability is such that single-molecule junctions can be established. As a remarkable feature, we can induce temperature gradients across the junction, allowing for thermoelectrical measurements. On our poster we present first resoults of thermoelectricity measurements on gold-gold and gold-molecule-gold nanojunctions.

[Kis17] F. Kisslinger, et al., Charge-carrier transport in large-area epitaxial graphene. Annalen der Physik 1700048 (2017)