Published September 7, 2012
| public
Journal Article
Strongly Disordered TiN and NbTiNs-Wave Superconductors Probed by Microwave Electrodynamics
Abstract
We probe the effects of strong disorder (2:4 < kFl < 8:6) on superconductivity in thin films of niobium titanium nitride and titanium nitride by measuring the microwave electrodynamics in coplanar waveguide resonators. We find a gradual evolution of the electromagnetic response with disorder, deviating from BCS theory, for both materials. This result can be understood as due to changes in the quasiparticle density of states, induced by the short elastic scattering length. The observations are consistent with a model using an effective pair breaker, dependent on the level of disorder.
Additional Information
Copyright 2012 American Physical Society. Received 8 May 2012; published 7 September 2012. The authors thank Nathan Vercruyssen, Misha Feigel'man, Misha Skvortsov, and Jochem Baselmans for helpful discussions, and Marc Zuiddam and Tony Zijlstra for help in depositing the various thin films. T. M. K. thanks the Keck Institute for Space Studies for supporting his stay at the California Institute of Technology, which helped to initiate this work. The research was financially supported by MicroKelvin (Grant No. 228464, Capacities Specific Programme) and the Dutch Foundation for Research of Matter (FOM).Additional details
- Eprint ID
- 65281
- DOI
- 10.1103/PhysRevLett.109.107003
- Resolver ID
- CaltechAUTHORS:20160310-161220209
- Keck Institute for Space Studies (KISS)
- 228464
- MicroKelvin
- Dutch Foundation for Fundamental Research on Matter (FOM)
- Created
-
2016-03-11Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Keck Institute for Space Studies