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2D High-Temperature Superconductor Integration in Contact Printed Circuit Boards.

Christian N Saggau1, Sanaz Shokri1,2, Mickey Martini1,2

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Summary

Researchers developed a new cryogenic dry transfer method to fabricate stable superconducting devices from Bi2Sr2CaCu2O8+ films. This technique preserves the high superconducting transition temperature (Tc) of these 2D materials for quantum technologies.

Keywords:
2D materialscontact printinghigh-temperature superconductivityvia contacts

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Technologies

Background:

  • Bi2Sr2CaCu2O8+ films exhibit high Tc, efficient Josephson coupling, and fast quasiparticle relaxation, making them suitable for quantum computing.
  • Fabricating devices from 2D superconducting films is challenging due to material degradation from environmental exposure.

Purpose of the Study:

  • To develop a novel fabrication technique for creating stable superconducting devices from 2D Bi2Sr2CaCu2O8+ films.
  • To overcome the experimental challenge of preserving superconductivity during device fabrication.

Main Methods:

  • A cryogenic dry transfer technique was developed, embedding printable circuits within a silicon nitride membrane.
  • This method separates sensitive superconducting film creation from chemically intensive circuit fabrication.
  • The membrane provides electrical contacts and encapsulates the film, protecting it from environmental degradation.

Main Results:

  • Atomically thin Bi2Sr2CaCu2O8+-based devices were successfully fabricated using the new technique.
  • The devices demonstrated a high superconducting transition temperature (Tc) of approximately 91 K, close to bulk values.
  • Stable superconducting properties were observed, indicating successful preservation of material integrity.

Conclusions:

  • The cryogenic dry transfer method is effective for fabricating high-performance superconducting devices from 2D materials.
  • This technique enables the realization of stable, high-Tc superconducting devices for advanced quantum applications.
  • The developed method addresses a critical challenge in the practical application of 2D superconductors.