Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 34: Superconductivity: Tunneling and Josephson Junctions

TT 34.6: Talk

Tuesday, March 13, 2018, 11:00–11:15, H 2053

Tunneling spectroscopy of superconducting In_xSn_1−xTe nano-plates — •Fan Yang, Mengmeng Bai, Zhiwei Wang, and Yoichi Ando — Institute of Physics II, University of Cologne, Zuelpicher Str. 77, 50937 Cologne, Germany

With indium doping, superconductivity can be induced in SnTe, a well-known topological crystalline insulator. Due to the possible co-existence of superconductivity and non-trivial band topology, In_xSn_1−xTe provides a promising platform for searching for topological superconductivity.

In this talk, we present our study on the point-contact spectroscopy of superconducting In_xSn_1−xTe nanostructures. In_xSn_1−xTe nano-plates were grown on Si/SiO₂ substrates via vapor-transport method. After the growth, Au contacts with naturally formed tunnel barrier were fabricated on selected nano-plates. The conductance spectra of Au contacts were measured in a dilution refrigerator, and non-trivial sub-gap features were observed in several Au contacts at the tunnel limit. The preliminary results are presented and discussed.