Superconducting phase transitions in disordered NbTiN films
Journal Article
·
· Scientific Reports
- Inst. of Semiconductor Physics, Novosibirsk (Russia); Novosibirsk State Univ. (Russian Federation)
- Inst. of Semiconductor Physics, Novosibirsk (Russia); Inst. for Physics of Microstructures (Russia)
- Inst. de recherches sur les lois fundamentales de l’univers, Commissariat de l’énergie atomique et aux énergies renouvelables-Saclay, Gif-sur-Yvette (France)
- Inst. for Physics of Microstructures (Russia)
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Suppression of superconductivity in disordered systems is a fundamental problem of condensed matter physics. Here we investigate superconducting niobium-titanium-nitride (Nb1-xTixN) thin films grown by the atomic layer deposition (ALD) with slightly different growth process parameters. We observe a smooth crossover from the disorder-driven superconductor-normal metal transition (SMT) to the superconductor-insulator transition (SIT) via the intermediate Bose metal state detected by the low-temperature saturation of the temperature dependence of the sheet resistance. We demonstrate that the SIT via the intervening Bose metal state occurs if the sheet resistance of the film in the maximum, Rmax prior to the superconducting drop of R(T), exceeds Rq = h/4e2.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Contributing Organization:
- Russian Foundation for Basic Research
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1601971
- Journal Information:
- Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 10; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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