Evidence of Josephson coupling in a few-layer black phosphorus planar Josephson junction

Abstract

Setting up strong Josephson coupling in van der Waals materials in close proximity to superconductors offers several opportunities both to inspect fundamental physics and to develop novel cryogenic quantum technologies. Here we show evidence of Josephson coupling in a planar few-layer black Phosphorus junction. The planar geometry allows us to probe the junction behavior by means of external gates, at different carrier concentrations. Clear signatures of Josephson coupling are demonstrated by measuring supercurrent flow through the junction at milli Kelvin temperatures. Manifestation of Fraunhofer pattern with a transverse magnetic field is also reported, confirming the Josephson coupling. These findings represent the first evidence of proximity Josephson coupling in a planar junction based on a van der Waals material beyond graphene and open the way to new studies, exploiting the peculiar properties of exfoliated black phosphorus thin flakes.

References in corpus (18)

• The electronic properties of graphene
• Mixed-Dimensional van der Waals Heterostructures
• The Renaissance of Black Phosphorus
• Bipolar supercurrent in graphene
• Tunable Supercurrent Through Semiconductor Nanowires
• Josephson-junction infrared single-photon detector
• Anomalous Fraunhofer Interference in Epitaxial Superconductor-Semiconductor Josephson Junctions
• A Perspective on Recent Advances in Phosphorene Functionalization and its Application in Devices
• InSbAs two-dimensional electron gases as a platform for topological superconductivity
• Enhancement of Proximity Induced Superconductivity in a Planar Ge Hole Gas
• Anyons in Quantum Hall Interferometry
• Side gate tunable Josephson junctions at the LaAlO${}_3$/SrTiO${}_3$ interface
• Electrostatic tailoring of magnetic interference in quantum point contact ballistic Josephson junctions
• Intrinsically shunted Josephson junctions for electronics applications
• Control of superconducting pairing symmetries in monolayer black phosphorus
• Superconducting contacts to a monolayer semiconductor
• Full electrostatic control of quantum interference in an extended trenched Josephson junction
• Magnetic interference pattern in planar SNS Josephson junctions

Cited by in corpus (4)

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• Theory of scanning gate microscopy imaging of the supercurrent distribution in a planar Josephson junction
• Side-gate modulation of supercurrent in InSb nanoflag-based Josephson junctions
• Propagation of Visible Light in Nanostructured Niobium Stripes Embedded in a Dielectric Polymer