Superconductor-Nanowire Devices from Tunneling to the Multichannel Regime: Zero-Bias Oscillations and Magnetoconductance Crossover

Abstract

We present transport measurements in superconductor-nanowire devices with a gated constriction forming a quantum point contact. Zero-bias features in tunneling spectroscopy appear at finite magnetic fields, and oscillate in amplitude and split away from zero bias as a function of magnetic field and gate voltage. A crossover in magnetoconductance is observed: Magnetic fields above ~ 0.5 T enhance conductance in the low-conductance (tunneling) regime but suppress conductance in the high-conductance (multichannel) regime. We consider these results in the context of Majorana zero modes as well as alternatives, including Kondo effect and analogs of 0.7 structure in a disordered nanowire.

Supplemental Material here: https://dl.dropbox.com/u/1742676/Churchill_Supplemental.pdf

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• Electronic structures of [001]- and [111]-oriented InSb and GaSb free-standing nanowires
• Conductance asymmetries in mesoscopic superconducting devices due to finite bias
• Helical Majorana edge mode in a superconducting antiferromagnetic quantum spin Hall insulator
• Charge transport of a spin-orbit-coupled Luttinger liquid
• Signatures of Majorana Kramers pairs in superconductor-Luttinger liquid and superconductor-quantum dot-normal lead junctions
• Fractional Josephson effect in a quadruple quantum dot
• Protocol for reading out Majorana vortex qubit and testing non-Abelian statistics
• Majorana zero modes and their bosonization
• Majorana bound states in magnetic impurity chains: effects of $d$-wave pairing
• Scalable Fermionic Error Correction in Majorana Surface Codes
• Selective Area Superconductor Epitaxy to Ballistic Semiconductor Nanowires
• 1D Majorana Goldstinos and partial supersymmetry breaking in quantum wires
• Entanglement and Disordered-Enhanced Topological Phase in the Kitaev Chain
• Tunnel spectroscopy of Majorana bound states in topological superconductor-quantum dot Josephson junctions
• Majorana Doublets, Flat Bands, and Dirac Nodes in s-Wave Superfluids
• Magnetic manipulation of topological states in p-wave superconductors
• Microwave detection of gliding Majorana zero modes in nanowires
• Effects of Gapless Bosonic Fluctuations on Majorana Fermions in Atomic Wire Coupled to a Molecular Reservoir
• Proposal for measuring the parity anomaly in a topological superconductor ring
• Identify the topological superconducting order in a multi-band quantum wire
• Josephson-Current Signatures of Unpaired Floquet Majorana Bound States
• Noise insights into electronic transport
• Determining the spin-orbit coupling via spin-polarized spectroscopy of magnetic impurities
• Renormalization of the Majorana bound state decay length in a perpendicular magnetic field
• Coexistence of Strong and Weak Majorana Zero Modes in Anisotropic XY Spin Chain with Second-Neighbor Interaction
• Phonon-Assisted Andreev Reflection at Majorana Zero Mode
• Fractional Chern insulator edges and layer-resolved lattice contacts
• Quantum charge fluctuations of a proximitized nanowire
• Non-Kondo many-body physics in a Majorana-based Kondo type system
• Properties of the Majorana-state tunneling Josephson junction mediated by an interacting quantum dot
• Majorana fermions in quasi-1D and higher dimensional ultracold fermionic optical lattices
• Disordered Majorana nanowires: Studying disorder without any disorder
• Meissner effect induced Majorana zero modes at small magnetic field
• Majorana bound states in nanowire-superconductor hybrid systems in periodic magnetic fields
• Universal topological quantum computation with strongly correlated Majorana edge modes
• Majorana orthogonal transformation and Majorana zero modes in free fermionic systems
• Nodal S-wave Superconductivity in Antiferromagnetic Semimetals
• Transmission Amplitude through a Coulomb blockaded Majorana Wire
• Magneto-conductance of topological junctions based on two-dimensional electron gases reveals Majorana phases
• Proximity effects at the interface of a superconductor and a topological insulator in NbN - Bi_2Se_3 thin film bilayers
• Continuous error correction for Ising anyons
• Topological energy gaps in the [111]-oriented InAs/GaSb and GaSb/InAs core-shell nanowires
• Electrostatic control of quantum Hall ferromagnetic transition, a step toward reconfigurable network of helical channels
• Coulomb Blockade in Fractional Topological Superconductors
• Dual topological superconducting states in the layered titanium-based oxypnictide superconductor BaTi${}_2$Sb${}_2$O
• Role of Bath-Induced Many-Body Interactions in the Dissipative Phases of the Su-Schrieffer-Heeger Model
• Visibility of noisy quantum dot-based measurements of Majorana qubits
• Demonstrating Entanglement by Testing Bell's Theorem in Majorana Wires
• Unitary Symmetry-Protected Non-Abelian Statistics of Majorana Modes
• Reveal the non-local coherent nature from a dissipative Majorana teleportation
• The invisible Majorana bound state at the helical edge
• Effect of topological length on Bound states signatures in a Topological nanowire
• Majorana versus Andreev bound state energy oscillations in a 1D semiconductor-superconductor heterostructure
• Random matrix theory for the robustness, quantization, and end-to-end correlation of zero-bias conductance peaks in a class D ensemble
• Hidden Symmetry Decoupling of Majorana Fermions
• InSb Nanowires with Built-In GaxIn1-xSb Tunnel Barriers for Majorana Devices
• Symmetry-protected adiabatic quantum transistors
• Strain manipulation of Majorana fermions in graphene armchair nanoribbons
• Transport signatures of topological phases in double nanowires probed by spin-polarized STM
• Probing zero-modes of defect in Kitaev quantum wire
• Driving Topological Phases by Spatially Inhomogeneous Pairing Centers
• Extracting entangled qubits from Majorana fermions in quantum dot chains through the measurement of parity
• Effective models of doped quantum ladders of non-Abelian anyons
• Germanium-based hybrid semiconductor-superconductor topological quantum computing platforms: Disorder effects
• Do Rydberg chains yield Fibonacci anyons?
• Manipulating Andreev and Majorana Bound States with microwaves
• Transverse profile and 3D spin canting of a Majorana state in carbon nanotubes
• Generalized parafermions and non-local Josephson effect in multi-layer systems
• Dispersive 1D Majorana modes with emergent supersymmetry in 1D proximitized superconductors via spatially-modulated potentials and magnetic fields
• Disorder-induced subgap states and Majorana zero-energy edge modes in two-dimensional topological insulator-superconductor hybrid structures
• Evolution of the transmission phase through a Coulomb-blockaded Majorana wire
• Majorana fermions in the nonuniform Ising-Kitaev chain: exact solution
• Concomitant opening of a topological bulk-gap with an emerging Majorana edge-state
• Revisiting 2-pi phase slip suppression in topological Josephson junctions
• Interaction Driven Floquet Engineering of Topological Superconductivity in Rashba Nanowires
• Quantum Criticality in Resonant Andreev Conduction
• Magnetoresistance and gating effects in ultrathin NbN-$\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{e}}_3$ bilayers
• Majorana fermions in $T$-shaped semiconductor nanostructures
• "Smile"-gap in the density of states of a cavity between superconductors
• Unitary preparation of many body Chern insulators: Adiabatic bulk boundary correspondence
• Readout of Majorana bound states via Landau-Zener transition
• Bound states in the continuum poisoned by Majorana fermions
• Protected gap closing in Josephson junctions constructed on Bi${}_2$Te${}_3$ surface
• Constrained thermalisation and topological superconductivity
• Frustration-free Hamiltonians supporting Majorana zero edge modes
• Insulating regime of an underdamped current-biased Josephson junction supporting ${\mathbb{Z}}_3$ and ${\mathbb{Z}}_4$ parafermions
• Dephasing of Majorana qubits due to quasistatic disorder
• Subgap states in semiconductor-superconductor devices for quantum technologies: Andreev qubits and minimal Majorana chains
• Dynamical approach to improving Majorana qubits and distinguishing them from trivial bound states
• Detecting a quantum critical point in topological SN junctions
• Electronic structures of [111]-oriented free-standing InAs and InP nanowires
• Effect of Magnetic Field and Rashba Spin-Orbit Interaction on the Josephson Tunneling between Superconducting Nanowires
• Josephson current via an isolated Majorana zero mode
• Secondary "Smile"-gap in the density of states of a diffusive Josephson junction for a wide range of contact types
• Interplay between Coulomb blockade and Josephson effect in a topological superconductor-quantum dot device
• Supercurrent and phase slips in a ballistic carbon nanotube embedded into a van der Waals heterostructure
• Vision transformer based Deep Learning of Topological indicators in Majorana Nanowires
• Topologically protected heat pumping from braiding Majorana zero modes
• Superconductivity in quantum wires: A symmetry analysis
• High critical temperature nodal superconductors as building block for time-reversal invariant topological superconductivity
• Fermion-parity switches of the ground state of Majorana billiards
• Majorana Zero Modes in Cylindrical Semiconductor Quantum Wire
• Phonon-induced Majorana Qubit Relaxation in Tunnel-Coupled Two-Island Topological Superconductors
• Noncentrosymmetric superconductors in one dimension
• Disorder effects in planar semiconductor-superconductor structures: Majorana wires versus Josephson junctions
• Dissipative Majorana quantum wires
• Floquet-engineered diode performance in a Majorana-quantum dot Josephson junction
• Probing Majorana bound states via a pn-junction containing a quantum dot
• All-electrical spectroscopy of topological phases in semiconductor-superconductor heterostructures
• Majorana modes in multiband superconducting quantum wires
• Environmental Coulomb blockade of topological superconductor-normal metal junctions
• Majorana fermions in semiconductor nanostructures with two wires connected through ring
• Stabilizing topological superconductivity in disordered spin-orbit coupled semiconductor-superconductor heterostructures
• Triplet $p$-wave pairing correlation in low doped zigzag graphene nanoribbons
• Braids and phase gates through high-frequency virtual tunneling of Majorana Zero Modes
• Single and multi-frequency driving protocols in a Rashba nanowire proximitized to an s-wave superconductor
• Transport properties of hybrid topological superconductor devices in contact with an environment
• Superconductor/normal-metal/superconductor junction of topological superconductors revisited: Fractional Josephson current, fermion parity, and oscillating wavefunctions
• Moiré dispersion of edge states in spin chains on superconductors
• Tunable Majorana corner states driven by superconducting phase bias in a vertical Josephson junction
• The Simulation of Non-Abelian Statistics of Majorana Fermions in Ising Chain with Z2 Symmetry
• Maximal distant entanglement in Kitaev tube
• Critical region of topological trivial and nontrivial phases in interacting Kitaev chain with spatially varying potentials
• Effect of a tunnel barrier on the scattering from a Majorana bound state in an Andreev billiard
• Josephson Current in Rashba-based Superconducting Nanowires with Geometric Misalignment
• Detrimental effects of disorder in two-dimensional time-reversal invariant topological superconductors
• Majorana transport in superconducting nanowire with Rashba and Dresselhaus spin-orbit couplings
• Interaction effects in superconductor/quantum spin Hall devices: universal transport signatures and fractional Coulomb blockade
• 1D topological chains with Majorana fermions in 2D non-topological optical lattices
• Influence of Rashba spin-orbit coupling on the 0-$\pi$ transition and Kondo temperature in 1D superconductors
• Dynamical Phase Error in Interacting Topological Quantum Memories
• Ever-present Majorana bound state in a generic one-dimensional superconductor with odd number of Fermi surfaces
• Photoemission Spectroscopic Evidence of Multiple Dirac Cones in Superconducting BaSn${}_3$
• From Majorana fermions to topological quantum computation in semiconductor/superconductor heterostructures
• Chirality and spin transformation of triplet Cooper pairs upon interaction with singlet condensate
• Theoretical proposal to obtain strong Majorana evidence from scanning tunneling spectroscopy of a vortex with a dissipative environment
• Fingerprints of Majorana bound states in quantum-rings
• Mirror-protected Majorana zero modes in $f$-wave multilayer graphene superconductors
• Spin-resolved nonlocal transport in proximitized Rashba nanowires
• Majorana mode stacking, robustness and size effect in cylindrical nanowires
• Transport of Majorana Bound State in the presence of telegraph noise
• Superconducting spin properties of Majorana nanowires and the associated superconducting anomalous Hall effect
• Many-body Majorana-like zero modes without gauge symmetry breaking
• Josephson effect in multi-terminal superconductor-ferromagnet junctions coupled via triplet components
• Majorana edge states and topological properties in 1D/2D Rashba semiconductor proximity coupled to iron-based superconductor
• Deterministic topological quantum gates for Majorana qubits without ancillary modes
• Currents and current correlations in a topological superconducting nanowire beam splitter
• A unified numerical approach to semiconductor-superconductor heterostructures
• Double-dot interferometer for quantum measurement of Majorana qubits and stabilizers
• Renormalization effects in spin-polarized metallic wires proximitized by a superconductor: A scattering approach
• Phase diagrams of superconducting topological surface states
• Non-Abelian operation through scattering between chiral Dirac edge modes
• Tuning spin orbit interaction in high quality gate-defined InAs one-dimensional channels
• Effects of Majorana bound states on dissipation and charging in a quantum resistor-capacitor circuit
• Band twisting and resilience to disorder in long-range topological superconductors
• Majorana zero modes in semiconductor-superconductor hybrid structures: Defining topology in short and disordered nanowires through Majorana splitting
• Unified scattering approach to Josephson current and thermal noise in BCS and topological superconducting junctions
• Shuttling Majorana zero modes in disordered and noisy topological superconductors
• Majorana polarization in disordered heterostructures
• Universal quantum control over Majorana zero modes
• Dissipationless topological quantum computation for Majorana objects in sparse-dense mixed encoding process
• Properties of dissipative Floquet Majorana modes using a quantum dot
• Roughness scattering induced insulator-metal-insulator transition in a quantum wire
• Probing Andreev reflection reach in semiconductor-superconductor hybrids by Aharonov-Bohm effect
• Memory-Critical Dynamical Buildup of Phonon-Dressed Majorana Fermions
• Planar Josephson junction devices with narrow superconducting strips: Topological properties and optimization
• A hierarchy in Majorana non-abelian tests and hidden variable models
• Hidden chiral symmetries in BDI multichannel Kitaev chains
• Fermion parity gap and exponential ground state degeneracy of the one-dimensional Fermi gas with intrinsic attractive interaction
• Quantized conductance in a one-dimensional ballistic oxide nanodevice
• Mitigating disorder and optimizing topological indicators with vision-transformer-based neural networks in Majorana nanowires
• Detecting Majorana modes through Josephson junction ring-quantum dot hybrid architectures
• Manipulation of Majorana states in X-junction geometries
• Distinguishing Majorana bound states from accidental zero-energy modes with a microwave cavity
• Ballistic transport in 1D Rashba systems in the context of Majorana nanowires
• Giant and robust Josephson diode effect in multiband topological nanowires
• Current cross-correlation spectroscopy of Majorana bound states
• Majorana modes in graphene strips: polarization, wavefunctions, disorder, and Andreev states
• Classification of Majorana Fermions in Two-Dimensional Topological Superconductors
• Proximity-induced superconductivity generated by thin films: Effects of Fermi surface mismatch and disorder in the superconductor
• Cross-correlation mediated by Majorana island with finite charging energy
• Zero and Nonzero Energy Majorana Modes in an Extended Kitaev Chain
• Majorana edge modes in isolated wires