Regensburg 2019 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 14: Poster

DS 14.45: Poster

Dienstag, 2. April 2019, 17:00–20:00, Poster E

Highly conducting thin films of PdCoO2 prepared by MAD technique — Oleg Shapoval¹, Vladimir Roddatis², Sven Esser³, Thomas Zimmermann³, Philipp Gegenwart³, and •Vasily Moshnyaga¹ — ¹Erstes Physikalisches Institut, Georg-August-Universität Göttingen, Germany — ²Institut für Materialphysik, Georg-August-Universität Göttingen, Germany — ³Experimentalphysik VI, Center for Electronic Correlations and Magnetism, Augsburg University, Germany

Pd-based delafossite PdCoO2 (PCO) with 2D conducting layers and extremely large mean free path of electrons is of great interest for applications in thermal transport or as conducting electrodes. However, the information on the growth of PCO films is scarce. We report the structure and electric properties of PCO thin films grown by metalorganic aerosol deposition (MAD) technique on hexagonal substrates, i.e. Al2O3(0001), YSZ(111), as well as on Ca3Co4O9 buffered SrTiO3(100). Under optimized processing conditions, i.e. growth rate, deposition temperature, post-annealing, a 20 nm thick PCO(001)/YSZ(111) film shows room temperature resistivity 5*10(-6)Ohmcm and residual resistance ratio, RRR(5K)=3. Low temperature magnetotransport (Hall effect and Shubnikov-de Haas oscillations) will allow us to disentangle between intrinsic and extrinsic parameters and further improve the quality of PCO films. Financial support from DFG through SFB 1073 (TPA02), MO2255-4 and TRR 80 (TP G3) is acknowledged.