PT Journal
AU Coumou, PCJJ
   Driessen, EFC
   Bueno, J
   Chapelier, C
   Klapwijk, TM
TI Electrodynamic response and local tunneling spectroscopy of strongly disordered superconducting TiN films
SO Phys. Rev. B
PY 2013
BP 180505 (1 to 5)
VL 88
IS 18
DI 10.1103/PhysRevB.88.180505
DE strongly disordered superconducting TiN films; microwave resonators
AB We have studied the electrodynamic response of strongly disordered superconducting TiN films using microwave resonators, where the disordered superconductor is the resonating element in a high-quality superconducting environment of NbTiN. We describe the response assuming an effective pair-breaking mechanism modifying the density of states and compare this to local tunneling spectra obtained using scanning tunneling spectroscopy. For the least disordered film (kFl=8.7, Rs=13Ω), we find good agreement, whereas for the most disordered film (kFl=0.82, Rs=4.3kΩ), there is a strong discrepancy, which signals the breakdown of a model based on uniform properties.
ER