Local and Nonlocal Transport Spectroscopy in Planar Josephson Junctions

Abstract

We report simultaneously acquired local and nonlocal transport spectroscopy in a phase-biased planar Josephson junction based on an epitaxial InAs/Al hybrid two-dimensional heterostructure. Quantum point contacts at the junction ends allow measurement of the 2 x 2 matrix of local and nonlocal tunneling conductances as a function of magnetic field along the junction, phase difference across the junction, and carrier density. A closing and reopening of a gap was observed in both the local and nonlocal tunneling spectra as a function of magnetic field. For particular tunings of junction density, gap reopenings were accompanied by zero-bias conductance peaks (ZBCPs) in local conductances. End-to-end correlation of gap reopening was strong, while correlation of local ZBCPs was weak. A simple, disorder-free model of the device shows comparable conductance matrix behavior associated with a topological phase transition. Phase dependence helps distinguish possible origins of the ZBCPs.

References in corpus (20)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• Majorana bound states in a coupled quantum-dot hybrid-nanowire system
• Non-Abelian quantum order in spin-orbit-coupled semiconductors: The search for topological Majorana particles in solid state systems
• Scaling of Majorana Zero-Bias Conductance Peaks
• Transport spectroscopy of NS nanowire junctions with Majorana fermions
• Towards a realistic transport modeling in a superconducting nanowire with Majorana fermions
• Near-unity Cooper pair splitting efficiency
• Andreev rectifier: a nonlocal conductance signature of topological phase transitions
• Transparent Semiconductor-Superconductor Interface and Induced Gap in an Epitaxial Heterostructure Josephson Junction
• Estimating disorder and its adverse effects in semiconductor Majorana nanowires
• Three-terminal nonlocal conductance in Majorana nanowires: Distinguishing topological and trivial in realistic systems with disorder and inhomogeneous potential
• Anomalous Fraunhofer Interference in Epitaxial Superconductor-Semiconductor Josephson Junctions
• Local and non-local quantum transport due to Andreev bound states in finite Rashba nanowires with superconducting and normal sections
• Charge impurity effects in hybrid Majorana nanowires
• Topological superconductivity in planar Josephson junctions: Narrowing down to the nanowire limit
• Nonlocal measurement of quasiparticle charge and energy relaxation in proximitized semiconductor nanowires using quantum dots

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• InAs-Al Hybrid Devices Passing the Topological Gap Protocol
• Hunting for Majoranas
• Signatures of a topological phase transition in a planar Josephson junction
• Trivial Andreev band mimicking topological bulk gap reopening in the non-local conductance of long Rashba nanowires
• Probing Majorana localization in minimal Kitaev chains through a quantum dot
• Phase Asymmetry of Andreev Spectra From Cooper-Pair Momentum
• Electrostatic control of the proximity effect in the bulk of semiconductor-superconductor hybrids
• Control of Andreev bound states using superconducting phase texture
• Controlling Andreev bound states with the magnetic vector potential
• Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices
• Zeeman and Orbital Driven Phase Transitions in Planar Josephson Junctions
• Differential current noise as an identifier of Andreev bound states that induce nearly quantized conductance plateaus
• Topological Andreev Rectification
• Non-local transport signatures of topological superconductivity in a phase-biased planar Josephson junction
• Transport features of a topological superconducting nanowire with a quantum dot: conductance and noise
• Subgap states in semiconductor-superconductor devices for quantum technologies: Andreev qubits and minimal Majorana chains
• Long-range crossed Andreev reflection in topological insulator nanowires proximitized by a superconductor
• Challenges in detecting topological superconducting transitions via supercurrent and phase probes in planar Josephson junctions
• Fermionic quantum computation with Cooper pair splitters
• Electron Interference as a Probe of Majorana Zero Modes
• Josephson junction arrays as a platform for topological phases of matter
• Multiple Majorana bound states and their resilience against disorder in planar Josephson junctions
• Side-gate modulation of supercurrent in InSb nanoflag-based Josephson junctions
• Enhancement of the topological regime in elongated Josephson junctions
• Chiral adiabatic transmission protected by Fermi surface topology
• Magnetic field-free braiding and nontrivial fusion of Majorana bound states in high-temperature planar Josephson junctions
• Signatures of Majorana bound states in scanning gate microscopy of hybrid nanowires
• Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator