Superconducting atomic contacts under microwave irradiation

Abstract

We have measured the effect of microwave irradiation on the dc current-voltage characteristics of superconducting atomic contacts. The interaction of the external field with the ac supercurrents leads to replicas of the supercurrent peak, the well known Shapiro resonances. The observation of supplementary fractional resonances for contacts containing highly transmitting conduction channels reveals their non-sinusoidal current-phase relation. The resonances sit on a background current which is itself deeply modified, as a result of photon assisted multiple Andreev reflections. The results provide firm support for the full quantum theory of transport between two superconductors based on the concept of Andreev bound states.

References in corpus (4)

• Quantum properties of atomic-sized conductors
• Coherent low-energy charge transport in a diffusive S-N-S junction
• Subharmonic Shapiro steps and assisted tunneling in superconducting point contacts
• Phase diffusion and fractional Shapiro steps in superconducting quantum point contacts

Cited by in corpus (32)

• $4\pi$-periodic Josephson supercurrent in HgTe-based topological Josephson junctions
• The Josephson diode effect in supercurrent interferometers
• Josephson radiation from gapless Andreev bound states in HgTe-based topological junctions
• Asymmetric higher-harmonic SQUID as a Josephson diode
• Influence of chopped laser light onto the electronic transport through atomic-sized contacts
• Time-dependent quantum transport with superconducting leads: a discrete basis Kohn-Sham formulation and propagation scheme
• Supercurrent interference in few-mode nanowire Josephson junctions
• Role of electronic structure in photoassisted transport through atomic-sized contacts
• Microwave-assisted tunneling and interference effects in superconducting junctions under fast driving signals
• Theory of microwave-assisted supercurrent in quantum point contacts
• Photon-assisted tunneling at the atomic scale: Probing resonant Andreev reflections from Yu-Shiba-Rusinov states
• Charge-4e supercurrent in a two-dimensional InAs-Al superconductor-semiconductor heterostructure
• Supercurrent and Andreev bound state dynamics in superconducting quantum point contacts under microwave irradiation
• Levitons in superconducting point contacts
• Interfering Josephson diode effect in Ta2Pd3Te5 asymmetric edge interferometer
• Resonators coupled to voltage-biased Josephson junctions: From linear response to strongly driven nonlinear oscillations
• Quantifying quantum coherence of multiple-charge states in tunable Josephson junctions
• Timescale separation solution of Kadanoff-Baym equations for quantum transport in time-dependent fields
• Full counting statistics for electron transport in periodically driven quantum dots
• Spin-polarized Shapiro steps and spin-precession-assisted multiple Andreev reflection
• Anomalous modulation of Josephson radiation in nanowire-based Josephson junctions
• Microwave studies of the fractional Josephson effect in HgTe-based Josephson junctions
• Superconducting Quantum Point Contacts
• Half-integer Shapiro Steps in Strong Ferromagnetic Josephson Junctions
• Full Counting Statistics of Yu-Shiba-Rusinov Bound States
• Microwave-induced conductance replicas in hybrid Josephson junctions without Floquet-Andreev states
• AC Josephson effect in a gate-tunable Cd${}_3$As${}_2$ nanowire superconducting weak link
• Photon-assisted electronic and spin transport in a junction containing precessing molecular spin
• Microwave Excitation of Atomic Scale Superconducting Bound States
• Photon assisted tunneling of high order multiple Andreev reflections in epitaxial nanowire Josephson junctions
• Electron tunneling through hybrid superconducting-normal quantum point contacts under microwave radiation
• On-Demand and Tunable Andreev-Conversion of Single-Electron Charge Pulses