We have constructed a phase diagram in temperature-magnetic field-disorder space for homogeneously disordered superconducting tantalum thin films. Phases are phenomenologically identified by the nonlinear transport characteristics that are unique in each phase. The resulting phase diagram shows that a direct superconductor-insulator transition is prohibited at any disorder because the superconducting phase is completely surrounded by the intervening metallic phase.
@article{arxiv.0906.0629,
title = {Transport Phase Diagram of Homogeneously Disordered Superconducting Thin Films},
author = {Yize Li and Carlos L. Vicente and Jongsoo Yoon},
journal= {arXiv preprint arXiv:0906.0629},
year = {2009}
}