Keywords
Superconductivity, Percolation, Microwave Spectroscopy, Criticality
Successively connecting isolated, conducting, microscopic islands eventually leads to percolation with macroscopic conduction. The macroscopically insulating state close to such an insulator-conductor transition can be strongly polarized and should exhibit a divergence of the dielectric constant when approaching this transition. In this project, we want to study this diverging dielectric constant near percolation for the case of a superconductor, namely Sn. We will use cryogenic microwave coplanar resonators as probes, which are covered with island-structured non-percolated Sn films, and we will study their dielectric response above and below the superconducting transition temperature.
Marc Scheffler
Dr.Head of the Microwave Lab
![This image shows Martin Dressel](https://www.pi1.uni-stuttgart.de/img/employees/Dressel-4.jpg?__scale=w:150,h:150,cx:40,cy:0,cw:980,ch:980)
Martin Dressel
Prof. Dr. rer. nat.Head of Institute