Detecting Induced p ± ip Pairing at the Al-InAs Interface with a Quantum Microwave Circuit

Superconductor-semiconductor hybrid devices are at the heart of several proposed approaches to quantum information processing, but their basic properties remain to be understood. We embed a twodimensional Al-InAs hybrid system in a resonant microwave circuit, probing the breakdown of superconductivity due to an applied magnetic field. We find a fingerprint from the two-component nature of the hybrid system, and quantitatively compare with a theory that includes the contribution of intraband p +/- ip pairing in the InAs, as well as the emergence of Bogoliubov-Fermi surfaces due to magnetic field. Separately resolving the Al and InAs contributions allows us to determine the carrier density and mobility in the InAs.

Automated summary

Superconductor-semiconductor hybrid devices are essential for quantum information processing. This study investigates the breakdown of superconductivity in a two-dimensional Al-InAs hybrid system under an applied magnetic field, and accurately analyzes the contribution of different components in the system.