AC Josephson effect in a gate-tunable Cd${}_3$As${}_2$ nanowire superconducting weak link

Abstract

Three-dimensional topological Dirac semimetals have recently gained significant attention, since they possess exotic quantum states. When constructing Josephson junctions utilizing these materials as the weak link, the fractional ac Josephson effect emerges in the presence of a topological supercurrent contribution. We investigate the ac Josephson effect in a Dirac semimetal Cd${}_3$As${}_2$ nanowire using two complementary methods: by probing the radiation spectrum and by measuring Shapiro patterns. With both techniques, we find that conventional supercurrent dominates at all investigated doping levels and that any potentially present topological contribution falls below our detection threshold. The inclusion of thermal noise in a resistively and capacitively shunted junction (RCSJ) model allows us to reproduce the microwave characteristics of the junction. With this refinement, we explain how weak superconducting features can be masked and provide a framework to account for elevated electronic temperatures present in realistic experimental scenarios.

References in corpus (50)

• Topological insulators and superconductors
• Fault-tolerant quantum computation by anyons
• Non-Abelian Anyons and Topological Quantum Computation
• Unpaired Majorana fermions in quantum wires
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• A generic new platform for topological quantum computation using semiconductor heterostructures
• Non-abelian statistics of half-quantum vortices in p-wave superconductors
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Dirac semimetal in three dimensions
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Majorana fermions in a tunable semiconductor device
• Observation of the fractional ac Josephson effect: the signature of Majorana particles
• Josephson Current and Noise at a Superconductor-Quantum Spin Hall Insulator-Superconductor Junction
• Topological Semimetals
• Scalable Designs for Quasiparticle-Poisoning-Protected Topological Quantum Computation with Majorana Zero Modes
• Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
• Giant negative magnetoresistance induced by the chiral anomaly in individual Cd3As2 nanowires
• $4\pi$-periodic Josephson supercurrent in HgTe-based topological Josephson junctions
• Fractional ac Josephson effect in p- and d-wave superconductors
• Gapless Andreev bound states in the quantum spin Hall insulator HgTe
• AC Josephson effect in finite-length nanowire junctions with Majorana modes
• Josephson radiation from gapless Andreev bound states in HgTe-based topological junctions
• Dynamical detection of Majorana fermions in current-biased nanowires
• Observation of the 4$\pi$-periodic Josephson effect in indium arsenide nanowires
• 3D Dirac semimetal Cd3As2: A review of material properties
• Dynamics of Majorana States in a Topological Josephson Junction
• Supercurrent-carrying density of states in diffusive mesoscopic Josephson weak links
• $4\pi$ periodic Andreev bound states in a Dirac semimetal
• Missing Shapiro steps in topologically trivial Josephson Junction on InAs quantum well
• Josephson junction dynamics in the presence of $2\pi$- and $4\pi$-periodic supercurrents
• Ac Josephson Effect in Topological Josephson Junctions
• π and 4π Josephson Effects Mediated by a Dirac Semimetal
• Joule overheating poisons the fractional ac Josephson effect in topological Josephson junctions
• Superconducting atomic contacts under microwave irradiation
• AC Josephson effect and resonant Cooper pair tunneling emission of a Cooper Pair Transistor
• Signatures of a 4$\pi$-periodic supercurrent in the voltage response of capacitively shunted topological Josephson junctions
• Silver-Epoxy Microwave Filters and Thermalizers for Millikelvin Experiments
• Bulk and surface states carried supercurrent in ballistic Nb-Dirac semimetal Cd3As2 nanowire-Nb junctions
• Multiple Andreev reflections and Shapiro steps in a Ge-Si nanowire Josephson junction
• Proximity-induced superconductivity in (Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_3$ topological-insulator nanowires
• Josephson current signatures of the Majorana flat bands on the surface of time-reversal-invariant Weyl and Dirac semimetals
• Quantum dots formed in three-dimensional Dirac semimetal Cd${}_3$As${}_2$ nanowires
• Characterization of Shapiro steps in the presence of a 4π-periodic Josephson current
• Evolution of $4\pi$-periodic Supercurrent in the Presence of In-plane Magnetic Field
• Anomalous modulation of Josephson radiation in nanowire-based Josephson junctions
• Nonadiabatic Dynamics of Strongly Driven Diffusive Josephson Junctions
• Josephson radiation from nonlinear dynamics of Majorana zero modes
• Unusual Superconducting Proximity Effect in Magnetically Doped Topological Josephson Junctions
• Optimal Conditions for Observing Fractional Josephson Effect in Topological Josephson Junctions

Cited by in corpus (4)

• Charge-4e supercurrent in a two-dimensional InAs-Al superconductor-semiconductor heterostructure
• Time reversal symmetry breaking and zero magnetic field Josephson diode effect in Dirac semimetal Cd3As2-mediated asymmetric SQUIDs
• Period-doubling in the phase dynamics of a shunted HgTe quantum well Josephson junction
• Unveiling Topological Hinge States in the Higher-Order Topological Insulator WTe${}_2$ Based on the Fractional Josephson Effect