Superconducting phase transitions in ultrathin TiN film.
Journal Article
·
· Europhysics Letters
- Materials Science Division
Building on the complete account of quantum contributions to conductivity, we demonstrate that the resistance of thin superconducting films exhibits a non-monotonic temperature behavior due to the competition between weak localization, electron-electron interaction, and superconducting fluctuations. We show that superconducting fluctuations give rise to an appreciable decrease in the resistance even at temperatures well exceeding the superconducting transition temperature, T{sub c}, with this decrease being dominated by the Maki-Thompson process. The transition to a global phase-coherent superconducting state occurs via the Berezinskii-Kosterlitz-Thouless (BKT) transition, which we observe both by power-law behavior in current-voltage characteristics and by flux flow transport in the magnetic field. The ratio T{sub BKT}/T{sub c} follows the universal relation.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1037568
- Report Number(s):
- ANL/MSD/JA-72214
- Journal Information:
- Europhysics Letters, Journal Name: Europhysics Letters Journal Issue: 1 Vol. 97; ISSN 0295-5075
- Country of Publication:
- United States
- Language:
- ENGLISH
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