Broadband Corbino spectroscopy and stripline resonators to study the microwave properties of superconductors


  • Marc Scheffler Universität Stuttgart
  • M. Maximilian Felger Universität Stuttgart
  • Markus Thiemann Universität Stuttgart
  • Daniel Hafner Universität Stuttgart
  • Katrin Schlegel Universität Stuttgart
  • Martin Dressel Universität Stuttgart
  • Konstantin S. Ilin KIT, Karlsruhe
  • Michael Siegel KIT, Karlsruhe
  • Silvia Seiro Max Planck Institute for Chemical Physics of Solids, Dresden
  • Christoph Geibel Max Planck Institute for Chemical Physics of Solids, Dresden
  • Frank Steglich Max Planck Institute for Chemical Physics of Solids, Dresden



Superconducting materials are of great interest both for the fundamental understanding of electrons in solids as well as for a range of different applications. Studying superconductors with microwaves offers a direct experimental access to the electrodynamic response of these materials, which in turn can reveal fundamental material properties such as the superconducting penetration depth. Here we describe two different techniques to study superconductors at microwave frequencies: the broadband Corbino approach can cover frequencies from the MHz range up to 50 GHz continuously but is limited to thin-film samples whereas the stripline resonators are sensitive enough to study low-loss single crystals but reveal data only at a set of roughly equidistant resonant frequencies. We document the applicability of these two techniques with data taken on an ultrathin TaN film and a single crystal of the heavy-fermion superconductor CeCu2Si2, respectively.






Research Papers