# Evidence of Spatially Inhomogeous Pairing on the Insulating Side of a Disorder-Tuned Superconductor-Insulator Transition

## TL;DR

This study provides evidence that in amorphous indium oxide films near the superconductor-insulator transition, superconducting pairing becomes spatially inhomogeneous due to disorder, resembling granular behavior despite the non-granular nature of the films.

## Contribution

It demonstrates that disorder induces spatially inhomogeneous pairing with a spectral gap in amorphous films, supporting models of inhomogeneous superconductivity.

## Key findings

- Presence of superconducting islands on the insulating side
- Behavior similar to granular films despite non-granular structure
- Supports models of disorder-induced inhomogeneous pairing

## Abstract

Measurements of transport properties of amorphous insulating indium oxide thin films have been interpreted as evidence of the presence of superconducting islands on the insulating side of a disorder-tuned superconductor-insulator transition. Although the films are not granular, the behavior is similar to that observed in granular films. The results support theoretical models in which the destruction of superconductivity by disorder produces spatially inhomogenous pairing with a spectral gap.