Parity independence of the zero-bias conductance peak in a nanowire based topological superconductor-quantum dot hybrid device
arXiv:1406.4435 · doi:10.1038/srep07261
Abstract
We explore the signatures of Majorana fermions in a nanowire based topological superconductor-quantum dot-topological superconductor hybrid device by charge transport measurements. The device is made from an epitaxially grown InSb nanowire with two superconductor Nb contacts on a Si/SiO substrate. At low temperatures, a quantum dot is formed in the segment of the InSb nanowire between the two Nb contacts and the two Nb contacted segments of the InSb nanowire show superconductivity due to the proximity effect. At zero magnetic field, well defined Coulomb diamonds and the Kondo effect are observed in the charge stability diagram measurements in the Coulomb blockade regime of the quantum dot. Under the application of a finite, sufficiently strong magnetic field, a zero-bias conductance peak structure is observed in the same Coulomb blockade regime. It is found that the zero-bias conductance peak is present in many consecutive Coulomb diamonds, irrespective of the even-odd parity of the quasi-particle occupation number in the quantum dot. In addition, we find that the zero-bias conductance peak is in most cases accompanied by two differential conductance peaks, forming a triple-peak structure, and the separation between the two side peaks in bias voltage shows oscillations closely correlated to the background Coulomb conductance oscillations of the device. The observed zero-bias conductance peak and the associated triple-peak structure are in line with the signatures of Majorana fermion physics in a nanowire based topological superconductor-quantum dot-topological superconductor system, in which the two Majorana bound states adjacent to the quantum dot are hybridized into a pair of quasi-particle states with finite energies and the other two Majorana bound states remain as the zero-energy modes located at the two ends of the entire InSb nanowire.
arXiv comment6 pages, 4 figures
References in corpus (29)
- Non-Abelian Anyons and Topological Quantum Computation
- 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
- Paired states of fermions in two dimensions with breaking of parity and time-reversal symmetries, and the fractional quantum Hall effect
- Helical liquids and Majorana bound states in quantum wires
- New directions in the pursuit of Majorana fermions in solid state systems
- Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
- Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
- Superconductor-Nanowire Devices from Tunneling to the Multichannel Regime: Zero-Bias Oscillations and Magnetoconductance Crossover
- Spin-resolved Andreev levels and parity crossings in hybrid superconductor-semiconductor nanostructures
- Tunable Supercurrent Through Semiconductor Nanowires
- Kondo effect in an integer-spin quantum dot
- Supercurrent reversal in quantum dots
- Majorana Fermions in Semiconductor Nanowires
- Orbital Kondo effect in carbon nanotubes
- Towards a realistic transport modeling in a superconducting nanowire with Majorana fermions
- Zero-bias anomaly in a nanowire quantum dot coupled to superconductors
- A Majorana smoking gun for the superconductor-semiconductor hybrid topological system
- Ge/Si nanowire mesoscopic Josephson junctions
- Search for Majorana fermions in multiband semiconducting nanowires
- Electron transport in single wall carbon nanotube weak links in the Fabry-Perot regime
- Effects of electron scattering on the topological properties of nanowires: Majorana fermions from disorder and superlattices
- Supercurrent and multiple Andreev reflections in an InSb nanowire Josephson junction
- Shiba impurity bound states as a probe of topological superconductivity and Fermion parity changing quantum phase transitions
- Correlation-induced conductance suppression at level degeneracy in a quantum dot
- Charge transport in InAs nanowire Josephson junctions
- Quantized conductance and its correlation to the supercurrent in a nanowire connected to superconductors
- Proximity effect in a two dimensional electron gas probed with a lateral quantum dot
Cited by in corpus (60)
- Majorana bound states in a coupled quantum-dot hybrid-nanowire system
- From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires
- Nonlocality of Majorana Modes in Hybrid Nanowires
- Majorana nanowires for topological quantum computation
- Conductance Quantization at zero magnetic field in InSb nanowires
- Probing Majorana Physics in Quantum Dot Shot Noise Experiments
- Free-Standing Two-Dimensional Single-Crystalline InSb Nanosheets
- Orbital effect of magnetic field on the Majorana phase diagram
- How quickly can anyons be braided? Or: How I learned to stop worrying about diabatic errors and love the anyon
- Supercurrent interference in few-mode nanowire Josephson junctions
- Strong spin-orbit interaction and magnetotransport in semiconductor BiOSe nanoplates
- Magnetically-driven colossal supercurrent enhancement in InAs nanowire Josephson junctions
- Vectorial control of the spin-orbit interaction in suspended InAs nanowires
- Detection of Majorana Kramers pairs using a quantum point contact
- Study of 0- phase transition in hybrid superconductor-InSb nanowire quantum dot devices
- Braiding Majorana Fermions and Creating Quantum Logic Gates with Vortices on a Periodic Pinning Structure
- Dominant non-local superconducting proximity effect due to electron-electron interaction in a ballistic double nanowire
- Majorana zero modes choose Euler numbers - revealed by full counting statistics
- Hard superconducting gap and diffusion-induced superconductors in Ge-Si nanowires
- Formation of Long Single Quantum Dots in High Quality InSb Nanowires Grown by Molecular Beam Epitaxy
- Fractional Josephson Effect in Number-Conserving Systems
- Topological superconductivity in a multichannel Yu-Shiba-Rusinov chain
- Optimizing spin-orbit splittings in InSb Majorana nanowires
- Schottky barrier and contact resistance of InSb nanowire field effect transistors
- Coherent transport in a linear triple quantum dot made from a pure-phase InAs nanowire
- Suspended InAs nanowire Josephson junctions assembled via dielectrophoresis
- k.p theory of freestanding narrow band gap semiconductor nanowires
- Transport through a Majorana island: strong tunneling regime
- Impurity-induced states in superconducting heterostructures
- Gate defined quantum dot realized in a single crystalline InSb nanosheet
- Hallmarks of non-trivial topology in Josephson junctions based on oxide nanochannels
- Experimental review on Majorana zero-modes in hybrid nanowires
- Long Range Coulomb Interaction and the Majorana Fermions
- Anomalous modulation of Josephson radiation in nanowire-based Josephson junctions
- Detecting Majorana modes by readout of poisoning-induced parity flips
- Isolating Majorana fermions with finite Kitaev nanowires and temperature: the universality of the zero-bias conductance
- Electronic structures of [001]- and [111]-oriented InSb and GaSb free-standing nanowires
- Signatures of Majorana Kramers pairs in superconductor-Luttinger liquid and superconductor-quantum dot-normal lead junctions
- Quasiparticle trapping at vortices producing Josephson supercurrent enhancement
- Tunnel spectroscopy of Majorana bound states in topological superconductor-quantum dot Josephson junctions
- Properties of the Majorana-state tunneling Josephson junction mediated by an interacting quantum dot
- Universal topological quantum computation with strongly correlated Majorana edge modes
- Quantum charge fluctuations of a proximitized nanowire
- Coulomb Blockade in Fractional Topological Superconductors
- Topological energy gaps in the [111]-oriented InAs/GaSb and GaSb/InAs core-shell nanowires
- Supercurrent, Multiple Andreev Reflections and Shapiro Steps in InAs Nanosheet Josephson Junctions
- Strain manipulation of Majorana fermions in graphene armchair nanoribbons
- Multi-level effects in quantum-dot based parity-to-charge conversion of Majorana box qubits
- Majorana fermions in topological insulator nanowires: from single superconducting nanowires to Josephson junctions
- Measurements of anisotropic g-factors for electrons in InSb nanowire quantum dots
- Dephasing of Majorana qubits due to quasistatic disorder
- Electronic structures of [111]-oriented free-standing InAs and InP nanowires
- Majorana transport in superconducting nanowire with Rashba and Dresselhaus spin-orbit couplings
- Dissipationless topological quantum computation for Majorana objects in sparse-dense mixed encoding process
- Gate-tunable negative differential conductance in hybrid semiconductor-superconductor devices
- Quantum transport in an ambipolar InSb nanowire quantum dot device
- Phase diagrams of superconducting topological surface states
- Manipulation of Majorana states in X-junction geometries
- Sub-gap Fano resonances in a topological superconducting wire with on-site Coulomb interactions
- Spin splitting, Kondo correlation and singlet-doublet quantum phase transition in a superconductor-coupled InSb nanosheet quantum dot