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

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.