From a superconductor to a Mott insulator: The case of granular aluminum

Nimrod Bachar, Aviv Glezer Moshe

Research output: Contribution to journalArticlepeer-review


Understanding the nature of the metal-to-insulator in films consisting of nano-scale aluminum grains embedded in an insulating matrix, namely granular aluminum, is essential both on the fundamental level and for applications such as quantum circuits. We show how the evolution of the system from the metallic side (and superconducting at low temperatures) to the insulator side, through a Mott transition, involves rich physics such as the Kondo effect, pseudo-gap effects, collective modes, and a BCS–BEC crossover. We focus on samples prepared on a liquid nitrogen-cooled substrate, having a grain size of about 2 nm, and suggest that the role of the grain size and hence quantum size effects are essential to explain some of the observed phenomena.

Original languageEnglish
Article number1354359
JournalPhysica C: Superconductivity and its Applications
StatePublished - 15 Nov 2023


  • Granular superconductors
  • High kinetic inductance device
  • Kubo spins
  • Mott transition
  • Quantum confinement
  • Superconductivity

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'From a superconductor to a Mott insulator: The case of granular aluminum'. Together they form a unique fingerprint.

Cite this