SKM 2021 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 5: Poster Session: Superconductivity
TT 5.14: Poster
Montag, 27. September 2021, 13:30–16:00, P
Optimization of Sr2RuO4 thin films grown by pulsed laser deposition — •Priyana Puliyappara Babu, Roman Hartmann, Alfredo Spuri, Sohaila Zaghloul Nabi Mohammed, Elke Scheer, and Angelo Di Bernardo — University of Konstanz, 78457 Konstanz, Germany
Since its discovery in 1994, Sr2RuO44 has been the subject of intensive studies aiming at shedding light on the nature of its superconducting order parameter (OP). Despite earlier reports suggesting an unconventional nature of the Sr2RuO4 superconductivity, conflicting results have been recently reported and a definitive conclusion about the superconducting OP symmetry has not been yet achieved. To address some of the open questions, it is crucial to fabricate superconducting devices based on high-quality superconducting thin films of Sr2RuO4. However, this task has proven challenging due the sensitivity of Sr2RuO4 to disorder and impurities. We have carried out a systematic study to optimize the transport properties of Sr2RuO4 thin films grown by pulsed laser deposition using Sr3RuO7 single crystals as the material source. Thin films with very low density of defects, high residual resistivity ratio (> 20) and fully metallic down to low temperatures have been grown. The growth parameters that can be further optimized to get fully superconducting thin films have also been identified.