SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 59: Poster Session: Topology
TT 59.6: Poster
Donnerstag, 30. März 2023, 15:00–18:00, P2/OG4
Axial topological insulator based DC SQUID in external SQUID layout — •Jan Karthein1,3, Erik Zimmermann1,3, Max Vaßen Carl1,3, Gerrit Behner1,3, Abdur Rehman Jalil1,3, Gregor Mussler1,3, Peter Schüffelgen1,3, Hans Lüth1,3, Detlev Grützmacher1,2,3, and Thomas Schäpers1,3 — 1Peter Grünberg Institut (PGI-9), Forschungszentrum Jülich, 52425 Jülich, Germany — 2Peter Grünberg Institut (PGI-10), Forschungszentrum Jülich, 52425 Jülich, Germany — 3JARA-Fundamentals of Future Information Technology, Jülich-Aachen Research Alliance, Forschungszentrum Jülich and RWTH Aachen University, 52425 Jülich, Germany
A three-dimensional topological insulator (TI) nanowire proximitized with a superconductor is predicted to be host to Majorana bound states that provide a platform for fault-tolerant quantum computation. Recently, axial TI-nanowire based DC SQUIDs showed coherent oscillations originating from the interference of topological surface states. We fabricate an axial TI-nanowire based DC SQUID with a neighboring Josephson junction completely in-situ, using selective-area growth and shadow mask fabrication techniques. An out-of-plane magnetic field is able to tune the flux inside the so formed external SQUID loop, while being decoupled from the in-plane magnetic field that tunes the flux inside the TI-nanowire. Coherent SQUID oscillations are visible when sweeping both the out-of-plane and in-plane magnetic field, proving that the axial TI-nanowire based DC SQUID and the external DC SQUID are experiencing phase-coherent transport.