Power law resistivity behavior in 2D superconductors across the magnetic-field tuned superconductor-insulator transition

TL;DR

This study reveals a universal power-law resistivity behavior in amorphous indium-oxide thin films near the superconductor-insulator transition, highlighting the role of vortices in transport across phases.

Contribution

It demonstrates that resistivity follows a power-law dependence on magnetic field across the transition, emphasizing vortex involvement in both superconducting and insulating states.

Findings

Resistivity exhibits a power-law dependence on magnetic field.

Vortices are central to transport mechanisms in both phases.

Power-law behavior persists into the insulating state.

Abstract

We present the results of a systematic study of thin-films of amorphous indium-oxide near the superconductor-insulator transition. We show that the film's resistivity follows a simple, well-defined, power-law dependence on the perpendicular magnetic field. This dependence holds well into the insulating state. Our results indicate that vortices play a central role in the transport of our films in the superconducting as well as insulating phases.