Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator

Abstract

Semiconductor-superconductor hybrid nanocircuits are of high interest due to their potential applications in quantum computing. Semiconductors with a strong spin-orbit coupling and large $g$-factor are particularly attractive since they are the basic building blocks of novel qubit architectures. However, for the engineering of these complex circuits, the building blocks must be characterized in detail. We have investigated a Josephson junction where the weak link is a two-dimensional electron gas (2DEG) hosted in an InAs/InGaAs heterostructure grown on a GaAs substrate. We employed the in-situ epitaxially grown Al layer as superconducting contacts to form an rf SQUID, and also to create a microwave resonator for sensing the Josephson inductance. We determined the gate-dependent current-phase relation, and observed supercurrent interference in out-of-plane magnetic fields. With the application of an in-plane magnetic field, we induced asymmetry in the interference pattern, which was found to be anisotropic in the device plane.

References in corpus (33)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana bound states in a coupled quantum-dot hybrid-nanowire system
• A Josephson junction supercurrent diode
• Realization of a minimal Kitaev chain in coupled quantum dots
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Parity qubits and poor man's Majorana bound states in double quantum dots
• Coherent manipulation of an Andreev spin qubit
• Direct manipulation of a superconducting spin qubit strongly coupled to a transmon qubit
• Tuning Yu-Shiba-Rusinov States in a Quantum Dot
• A two-site Kitaev chain in a two-dimensional electron gas
• Anomalous Fraunhofer Interference in Epitaxial Superconductor-Semiconductor Josephson Junctions
• Observation of Josephson Harmonics in Tunnel Junctions
• Robust poor man's Majorana zero modes using Yu-Shiba-Rusinov states
• Magnetic field tuning of coplanar waveguide resonators
• Superconducting Diode Effect Sign Change in Epitaxial Al-InAs Josepshon Junctions
• Local and Nonlocal Transport Spectroscopy in Planar Josephson Junctions
• Gate-tunable, superconductor-semiconductor parametric amplifier
• Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry
• Strong tunable coupling between two distant superconducting spin qubits
• Superconducting resonators with voltage-controlled frequency and nonlinearity
• A gate tunable transmon qubit in planar Ge
• Detecting induced $p\pm ip$ pairing at the Al-InAs interface with a quantum microwave circuit
• Phase-dependent microwave response of a graphene Josephson junction
• Linear AC Response of Diffusive SNS Junctions
• Flip-chip-based microwave spectroscopy of Andreev bound states in a planar Josephson junction
• Zeeman and Orbital Driven Phase Transitions in Planar Josephson Junctions
• Quasiparticle dynamics in epitaxial Al-InAs planar Josephson junctions
• Microwave Sensing of Andreev Bound States in a Gate-Defined Superconducting Quantum Point Contact
• Metamorphic InAs/InGaAs QWs with electron mobilities exceeding $7\times 10^{5}c{m}^2/Vs$
• Near-surface InAs 2DEG on a GaAs substrate: characterization and superconducting proximity effect
• Gatemonium: A Voltage-Tunable Fluxonium
• Spin-filtered measurements of Andreev bound states
• Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor in magnetic field