Zero-Energy Modes from Coalescing Andreev States in a Two-Dimensional Semiconductor-Superconductor Hybrid Platform

2017/03/31 by Henri J. Suominen, Henri Suominen, Morten Kjaergaard +9 · 10 citations
Physics and Astronomy · #Andreev reflection #Condensed matter physics #Conductance #Heterojunction #Lithography #MAJORANA #Nanowire #Optoelectronics #Physics #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Quantum tunnelling #Scaling #Semiconductor #Superconductivity #Topological Materials and Phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.119.176805

published as Phys. Rev. Lett. 119, 176805 (2017) · Includes Supplementary Material

openalex publication_date 2017/10/26 · arxiv created 2017/10/27 · arxiv updated 2017/10/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate zero-bias conductance peaks that arise from coalescing subgap Andreev states, consistent with emerging Majorana zero modes, in hybrid semiconductor-superconductor wires defined in a two-dimensional InAs/Al heterostructure using top-down lithography and gating. The measurements indicate a hard superconducting gap, ballistic tunneling contact, and in-plane critical fields up to 3 T. Top-down lithography allows complex geometries, branched structures, and straightforward scaling to multicomponent devices compared to structures made from assembled nanowires.

Citations

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Helical Liquids and Majorana Bound States in Quantum Wires
• Superconductor-nanowire devices from tunneling to the multichannel regime: Zero-bias oscillations and magnetoconductance crossover
• Anomalous Zero-Bias Conductance Peak in a Nb–InSb Nanowire–Nb Hybrid Device
• Fault-tolerant quantum computation by anyons

Cited by

• Limits of thermal conductance quantization in chiral topological Josephson junctions
• Numerical study of PbTe-Pb hybrid nanowires for engineering Majorana zero modes
• The quest and hope of Majorana zero modes in topological superconductor for fault-tolerant quantum computing: An introductory overview
• Fractional Josephson Vortices and Braiding of Majorana Zero Modes in Planar Superconductor-Semiconductor Heterostructures
• Control and detection of Majorana bound states in quantum dot arrays
• Shedding light on topological superconductors
• Fidelity and visibility loss in Majorana qubits by entanglement with environmental modes
• Parity-to-charge conversion for readout of topological Majorana qubits
• Tuning Supercurrent in Josephson Field-Effect Transistors Using h-BN Dielectric
• Determination of g-factor in InAs two-dimensional electron system by capacitance spectroscopy