Seminarium Fizyki Ciała Stałego

The realization of a topological superconductor in semiconductor nanowires requires advanced techniques to engineer induced superconductivity reproducibly. During the seminar, I will discuss an on-chip fabrication paradigm based on shadow walls that offers substantial advances in device quality and reproducibility. This approach allows for the implementation of novel quantum devices by eliminating many fabrication steps such as lithography and etching. This is critical to preserve the integrity and homogeneity of the fragile hybrid interfaces. The approach simplifies the reproducible fabrication of devices with a hard induced superconducting gap and ballistic normal-/superconductor junctions. Large gate-tunable supercurrents and high-order multiple Andreev reflections manifest the exceptional coherence of the resulting nanowire Josephson junctions. I will also present, how this approach can be utilized to create more complex devices, which allow to probe local density of states at both ends of nanowire. Lastly, I will show how to utilize this approach to prepare nanowire-based devices without a need of any post-fabrication.UwagaSeminarium w trybie zdalnympatrz instrukcja :instrukcja: (pdf file)AttentionThe seminar in the remote modesee instruction :instruction: (pdf file)