Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 2: Superconductivity: Properties and Electronic Structure 1
TT 2.8: Vortrag
Montag, 20. März 2017, 11:45–12:00, HSZ 103
Superconducting ferecrystals: turbostratically disordered atomic-scale layered (PbSe)1.14(NbSe2)n heterostructures — Corinna Grosse1, Matti B. Alemayehu2, Matthias Falmbigl2, Anna Mogilatenko3, Olivio Chiatti1, David C. Johnson2, and •Saskia F. Fischer1 — 1Novel Materials Group, Humboldt-Universität zu Berlin, 12489 Berlin, Germany — 2Dept. of Chemistry, University of Oregon, Eugene, Oregon 97403, United States — 3Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany
Hybrid electronic heterostructures of semi- and superconducting layers possess very different properties from their bulk counterparts. Here, we demonstrate superconductivity in ferecrystal films: turbostratically disordered single-, bi- and trilayers of NbSe2 separated by PbSe layers. The turbostratic (orientation) disorder between individual layers does not destroy superconductivity. The artificial sequences of atomic-scale 2D layers are structurally independent of their neighbours in the growth direction. This opens up new opportunities of stacking arbitrary numbers of hybrid superconducting-semiconducting layers in heterostructures which are not available otherwise, because epitaxial strain is avoided. The observation of superconductivity and systematic Tc changes with nanostructure make this synthesis approach of particular interest for realizing hybrid systems in the search of 2D superconductivity and the design of novel electronic hybrid heterostructures.
[1] C. Grosse et. al, Scientific Reports 6, 33457 (2016).