Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 17: Materials and devices for quantum technology I
HL 17.3: Vortrag
Montag, 16. März 2020, 15:30–15:45, POT 112
Fabrication of Topological Insulator Tunnel Junctions — •Dennis Heffels1, Tobias W. Schmitt1,2, Michael Schleenvoigt1, Kristof Moors1, Max Vassen-Carl1, Florian Lentz1, Benjamin Bennemann1, Gregor Mussler1, Peter Schüffelgen1, and Detlev Grützmacher1,2 — 1Peter Grünberg Institute, Forschungszentrum Jülich — 2JARA-FIT Institute Green IT, RWTH Aachen University
At the end of a one-dimensional topological superconductor Majorana zero modes are predicted to exist. As a possible platform for this exotic superconductivity, heterostructures of (BixSb1−x)2Te3 3D topological insulators (3D TIs) and s-wave superconductors are currently investigated. For this, tunneling spectroscopy is a powerful tool in order to characterize the superconducting proximity effect and detect signatures of Majorana zero modes as shown already on other hybrid platforms like proximitized III-V semiconductor nanowires. A major challenge in order to use this techique also for 3D TI nanoribbons is the fabrication of suitable tunnel junctions while simultaneously preventing the delicate 3D TI surface from degradation at ambient conditions. In this contribution, I will report on progress of a multi-step in situ fabrication technique to assemble tunnel junctions at the ends of proximitized 3D TI nanoribbons.