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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
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
OSTI Identifier:
1364138
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superconducting properties and materials

Citation Formats

Postolova, Svetlana V., Mironov, Alexey Yu., Baklanov, Mikhail R., Vinokur, Valerii M., and Baturina, Tatyana I.. Reentrant resistive behavior and dimensional crossover in disordered superconducting TiN films. United States: N. p., 2017. Web. doi:10.1038/s41598-017-01753-w.
Postolova, Svetlana V., Mironov, Alexey Yu., Baklanov, Mikhail R., Vinokur, Valerii M., & Baturina, Tatyana I.. Reentrant resistive behavior and dimensional crossover in disordered superconducting TiN films. United States. doi:10.1038/s41598-017-01753-w.
Postolova, Svetlana V., Mironov, Alexey Yu., Baklanov, Mikhail R., Vinokur, Valerii M., and Baturina, Tatyana I.. Thu . "Reentrant resistive behavior and dimensional crossover in disordered superconducting TiN films". United States. doi:10.1038/s41598-017-01753-w. https://www.osti.gov/servlets/purl/1364138.
@article{osti_1364138,
title = {Reentrant resistive behavior and dimensional crossover in disordered superconducting TiN films},
author = {Postolova, Svetlana V. and Mironov, Alexey Yu. and Baklanov, Mikhail R. and Vinokur, Valerii M. and Baturina, Tatyana I.},
abstractNote = {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.},
doi = {10.1038/s41598-017-01753-w},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {Thu May 11 00:00:00 EDT 2017},
month = {Thu May 11 00:00:00 EDT 2017}
}

Journal Article:
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  • We have investigated the bias-voltage dependence of the phase-dependent differential resistance of a disordered T-shaped two-dimensional electron gas coupled to two superconducting terminals. The resistance oscillations first increase upon lowering the energy. For bias voltages below the Thouless energy, the resistance oscillations are suppressed and disappear almost completely at zero bias voltage. We find a qualitative agreement with the calculated reentrant behavior of the resistance and discuss quantitative deviations. {copyright} {ital 1997} {ital The American Physical Society}
  • We report on the variation of the superconducting transition temperature with the electrical resistance ratio in weakly disordered Ge-covered tin films deposited at room temperature. The normal-state sheet resistance R/sub N//sup D'Alembertian/ varied between 0.2
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