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Title: Reentrant resistive behavior and dimensional crossover in disordered superconducting TiN films

Journal Article · · Scientific Reports
 [1];  [1];  [2]; ORCiD logo [3];  [4]
  1. A. V. Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk (Russia); Novosibirsk State Univ., Novosibirsk (Russia)
  2. North China Univ. of Technology, Beijing (China)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. A. V. Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk (Russia); Novosibirsk State Univ., Novosibirsk (Russia); Univ. Autonoma de Madrid, Madrid (Spain)

A reentrant temperature dependence of the normal state resistance often referred to as the N-shaped temperature dependence, is omnipresent in disordered superconductors – ranging from high-temperature cuprates to ultrathin superconducting films – that experience superconductor-to-insulator transition. Yet, despite the ubiquity of this phenomenon its origin still remains a subject of debate. Here we investigate strongly disordered superconducting TiN films and demonstrate universality of the reentrant behavior. We offer a quantitative description of the N-shaped resistance curve. We show that upon cooling down the resistance first decreases linearly with temperature and then passes through the minimum that marks the 3D-2D crossover in the system. In the 2D temperature range the resistance first grows with decreasing temperature due to quantum contributions and eventually drops to zero as the system falls into a superconducting state. As a result, our findings demonstrate the prime importance of disorder in dimensional crossover effects.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Russian Foundation for Basic Research; Ministry of Education and Science of the Russian Federation; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences and Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1364138
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (5)

Dynamical instability of the electric transport in superconductors journal September 2018
Dynamic Vortex-Mott Transition in 2D Superconducting Proximity Arrays preprint January 2020
Quantum contributions to the magnetoconductivity of critically disordered superconducting TiN films journal November 2018
Direct evidence for Cooper pairing without a spectral gap in a disordered superconductor above T c journal October 2021
Superconducting phase transitions in disordered NbTiN films journal January 2020

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