High-field side of Superconductor-Insulator Transition

Details High-field side of Superconductor-Insulator Transition High-field side of Superconductor-Insulator Transition

2002-10-11

arxiv.org/abs/cond-mat/0210250v1

Physics

Condensed Matter

Superconductivity

Submitted to LT23 Proceedings

Scientific paper

We report the experimental observation of a magnetic-field-tuned superconductor-insulator transition (SIT) in ultrathin TiN films. The low temperature transport properties of these films show scaling behavior consistent with a transition driven by quantum phase fluctuations in two-dimensional superconductor. The magnetoresistance reveals peak and a subsequent decrease in fields higher than the critical field. The temperature dependences of the isomagnetic resistance data on the high-field side of the SIT have been analyzed and the transition from insulating to metallic phase is found, with at high fields the zero-temperature asymptotic value of the resistance being equal to h/e^2.

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