Dresden 2017 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 4: Transport: Topological Insulators (jointly with DS, MA, HL, O)

TT 4.3: Talk

Monday, March 20, 2017, 10:00–10:15, HSZ 204

Proximity-induced superconductivity and quantum interference in topological crystalline insulator SnTe devices — •Robin Klett¹, Joachim Schönle², Denis Dyck¹, Karsten Rott¹, Shekhar Chandra³, Claudia Felser³, Wolfgang Wernsdorfer², and Günter Reiss¹ — ¹CSMD, Bielefeld University, Germany — ²CNRS, Institut Neél, France — ³MPI for Chemical Physics of Solids, Germany

Topological states of matter host a variety of new physics that is promising for future technology. Among these phenomena, the emergence of metallic symmetry-protected topological surface states (TSS) are of major interest. The coupling of topological matter to a nearby superconductor is forsaken to host unconventional proximity-induced superconductivity. We demonstrate the fabrication of superconducting Quantum interference devices (SQUIDs) out of SnTe/Nb hybrid structures. Our findings show strong proximity-induced superconductivity in the surface of SnTe. Transport contributions of Majorana Bound States are predicted to enter with a shift in periodicity to DC SQUID experiments. The Analysis of the SQUID response suggest the absence of periodicity shifts, but show additional features expected for TSS carried supercurrents, such as unconventional Fraunhofer shapes.