Conduction Channels of an InAs-Al nanowire Josephson weak link

Abstract

We present a quantitative characterization of an electrically tunable Josephson junction defined in an InAs nanowire proximitized by an epitax-ially-grown superconducting Al shell. The gate-dependence of the number of conduction channels and of the set of transmission coefficients are extracted from the highly nonlinear current-voltage characteristics. Although the transmissions evolve non-monotonically, the number of independent channels can be tuned, and configurations with a single quasi-ballistic channel achieved.

arXiv commentAdded reference in New Journal of Physics, corrected a few typos, and updated references

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Cited by in corpus (53)

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• A Parity-Protected Superconductor-Semiconductor Qubit
• Continuous monitoring of a trapped, superconducting spin
• A perspective on semiconductor-based superconducting qubits
• Nonlocal Josephson effect in Andreev molecules
• Andreev spin qubits in multichannel Rashba nanowires
• Geometry controlled superconducting diode and anomalous Josephson effect triggered by the topological phase transition in curved proximitized nanowires
• Andreev spectrum and supercurrents in nanowire-based SNS junctions containing Majorana bound states
• Anharmonicity of a Gatemon Qubit with a Few-Mode Josephson Junction
• Supercurrent interference in few-mode nanowire Josephson junctions
• Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon
• Observation of vanishing charge dispersion of a nearly-open superconducting island
• Signatures of interactions in the Andreev spectrum of nanowire Josephson junctions
• Fine energy splitting of overlapping Andreev bound states in multi-terminal superconducting nanostructures
• Current-phase relations of InAs nanowire Josephson junctions: from interacting to multi-mode regimes
• Microwave response of an Andreev bound state
• Gate-Tunable Transmon Using Selective-Area-Grown Superconductor-Semiconductor Hybrid Structures on Silicon
• Spin-orbit interaction and induced superconductivity in an one-dimensional hole gas
• Thermopower and thermal conductance of a superconducting quantum point contact
• Magnetic-Field-Compatible Superconducting Transmon Qubit
• Coherent Josephson thermodynamic cycles
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• Non-Hermitian phase-biased Josephson junctions
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• Controlled DC Monitoring of a Superconducting Qubit
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• The hybrid Josephson rhombus: A superconducting element with tailored current-phase relation
• Voltage-controlled synthesis of higher harmonics in hybrid Josephson junction circuits
• On-off switch and sign change for non-local Josephson diode in spin-valve Andreev molecules
• Thermodynamics of a phase-driven proximity Josephson junction
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• Investigation of InAs based devices for topological applications
• Fluxoid valve effect in full-shell nanowire Josephson junctions
• Strongly anharmonic flux-tunable transmon based on InAs-Al 2D heterostructure
• Impact of spin-orbit coupling and Zeeman interaction on the multiple Andreev reflections subharmonic gap structure in nanoscopic Josephson junctions
• Fluxoid solitons in superconducting tapered tubes and bottlenecks
• Towards a $\cos (2\phi )$ Josephson element using aluminum junctions with well-transmitted channels