Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 21: Superconductivity: Poster Session
TT 21.25: Poster
Montag, 16. März 2015, 15:00–18:00, Poster B
Structural and superconducting properties of epitaxial Fe1+ySe1−xTex thin films — •Stefan Richter1, Feifei Yuan1, Vadim Grinenko1, Alberto Sala2, Marina Putti2, and Ruben Hühne1 — 1Institute for Metallic Materials IFW Dresden — 2Dipartimento di Fisica, Università di Genova
The iron based superconductor Fe(Se,Te) is in the center of much ongoing research. The reason for this is on the one hand its simple crystal structure, that consists only of stacked Fe(Se,Te) layers so that structural and superconducting properties can be connected more easily, on the other hand FeSe itself shows a high sensibility for strain and changes in stoichiometry and can have potentially very high critical temperatures under hydrostatic pressure or in monolayers.
We investigate epitaxial thin films of Fe1+ySe1−xTex grown by pulsed laser deposition on different single crystalline substrates. A high crystalline quality and a superconducting transition of up to about 20 K can be achieved using optimized deposition parameters. The influence of growth conditions, Te-doping, film thickness and post growth oxygen treatment on the structural and superconducting properties on these films will be presented in detail.