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Title: Superconducting phase transitions in disordered NbTiN films

Journal Article · · Scientific Reports
 [1];  [2]; ORCiD logo [3];  [4];  [4]; ORCiD logo [5]; ORCiD logo [1]
  1. Inst. of Semiconductor Physics, Novosibirsk (Russia); Novosibirsk State Univ. (Russian Federation)
  2. Inst. of Semiconductor Physics, Novosibirsk (Russia); Inst. for Physics of Microstructures (Russia)
  3. Inst. de recherches sur les lois fundamentales de l’univers, Commissariat de l’énergie atomique et aux énergies renouvelables-Saclay, Gif-sur-Yvette (France)
  4. Inst. for Physics of Microstructures (Russia)
  5. 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, Vol. 10, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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