Zero-bias crossings and peculiar Shapiro maps in graphene Josephson junctions

Abstract

The AC Josephson effect manifests itself in the form of "Shapiro steps" of quantized voltage in Josephson junctions subject to RF radiation. This effect presents an early example of a driven-dissipative quantum phenomenon and is presently utilized in primary voltage standards. Shapiro steps have also become one of the standard tools to probe junctions made in a variety of novel materials. Here, we study Shapiro steps in a widely tunable graphene-based Josephson junction. We investigate the variety of patterns that can be obtained in this well-understood system depending on the carrier density, temperature, RF frequency, and magnetic field. Although the patterns of Shapiro steps can change drastically when just one parameter is varied, the overall trends can be understood and the behaviors straightforwardly simulated. The resulting understanding may help in interpreting similar measurements in more complex materials.

arXiv commentMain: 5 Pages + 4 Figures, Supplementary: 3 Pages + 3 Figures

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Cited by in corpus (10)

• The Multi-terminal Inverse AC Josephson Effect
• Half-integer Shapiro steps in highly transmissive InSb nanoflag Josephson junctions
• Microwave-assisted unidirectional superconductivity in Al-InAs nanowire-Al junctions under magnetic fields
• Photon assisted tunneling of high order multiple Andreev reflections in epitaxial nanowire Josephson junctions
• Biharmonic-Drive Tunable Josephson Diode
• Probing the topological band structure of diffusive multiterminal Josephson junction devices with conductance measurements
• Multiplet Supercurrents in a Josephson Circuit
• Phase dynamics in an AC driven multiterminal Josephson junction analogue
• Phase locking and noise driven dynamics in a Josephson junction electronic analog
• Anisotropic supercurrent suppression and revivals in a graphene-based Josephson junction under in-plane magnetic fields