Detecting induced $p\pm ip$ pairing at the Al-InAs interface with a quantum microwave circuit

Abstract

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 two-dimensional Al-InAs hybrid system in a resonant microwave circuit, probing the breakdown of superconductivity due to an applied magnetic field. We find a strong fingerprint from the two-component nature of the hybrid system, and quantitatively compare with a theory that includes the contribution of intraband $p\pm ip$ 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.

7+20 pages, 5+17 figures

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• Progress in superconductor-semiconductor topological Josephson junctions
• Anisotropic vortex squeezing in synthetic Rashba superconductors: a manifestation of Lifshitz invariants
• Circuit QED detection of induced two-fold anisotropic pairing in a hybrid superconductor-ferromagnet bilayer
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• Exploring van der Waals cuprate superconductors using a hybrid microwave circuit
• Antichiral edge states and Bogoliubov Fermi surfaces in a two-dimensional proximity-induced superconductor
• Semiclassical theory for the orbital magnetic moment of superconducting quasiparticles
• Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator
• Hybrid superinductance with Al/InAs
• Thermoelectric effect in a superconductor with Bogoliubov Fermi surfaces