The approach to a superconductor-to-Bose-insulator transition in disordered films

Abstract

Through a detailed study of scaling near the magnetic field-tuned superconductor-to-insulator transition in strongly disordered films, we find that results for a variety of materials can be collapsed onto a single phase diagram. The data display two clear branches, one with weak disorder and an intervening metallic phase, the other with strong disorder. Along the strongly disordered branch, the resistance at the critical point approaches $R_Q=h/4e^2$ and the scaling of the resistance is consistent with quantum percolation, and therefore with the predictions of the dirty boson model.

4 pages, 4 figures

References in corpus (2)

• Magnetically Induced Metallic Phase in Superconducting Tantalum Films
• Quantum Metallicity on the High-Field Side of the Superconductor-Insulator Transition

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