Superconductor-insulator transition in two-dimensional indium-indium-oxide composite

Bar Hen, Xinyang Zhang, Victor Shelukhin, Aharon Kapitulnik, Alexander Palevski

Research output: Contribution to journalArticlepeer-review

Abstract

The magnetic-field-tuned superconductor-to-insulator transition was studied in a hybrid system of superconducting indium islands, deposited on an indium oxide (InOx) thin film, which exhibits global superconductivity at low magnetic fields. Vacuum annealing was used to tune the conductivity of the InOx film, thereby tuning the inergrain coupling and the nature of the transition. The hybrid system exhibits a “giant” magnetoresistance above the magnetic-field-tuned superconductor-to-insulator transition (H-SIT), with critical behavior similar to that of uniform InOx films but at much lower magnetic fields, that manifests the duality between Cooper pairs and vortices. A key feature of this hybrid system is the separation between the quantum criticality and the onset of nonequilibrium behavior.

Original languageEnglish
Article numbere2015970118
JournalProceedings of the National Academy of Sciences of the United States of America
Volume118
Issue number2
DOIs
StatePublished - 12 Jan 2021

Keywords

  • Granular superconductivity
  • Quantum phase transition
  • Superconductor-insulator transition

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