Semiconductor-ferromagnet-superconductor planar heterostructures for 1D topological superconductivity
arXiv:2203.06644 · doi:10.1038/s41535-022-00489-9
Abstract
Hybrid structures of semiconducting (SM) nanowires, epitaxially grown superconductors (SC), and ferromagnetic-insulator (FI) layers have been explored experimentally and theoretically as alternative platforms for topological superconductivity at zero magnetic field. Here, we analyze a tripartite SM/FI/SC heterostructure but realized in a planar stacking geometry, where the thin FI layer acts as a spin-polarized tunneling barrier between the SM and the SC. We optimize the system's geometrical parameters using microscopic simulations, finding the range of FI thicknesses for which the hybrid system can be tuned into the topological regime. Within this range, and thanks to the vertical confinement provided by the stacking geometry, trivial and topological phases alternate regularly as the external gate is varied, displaying a hard topological gap that can reach half of the SC one. This is a significant improvement compared to setups using hexagonal nanowires, which show erratic topological regions with typically smaller and softer gaps. Our proposal provides a magnetic field-free planar design for quasi-one-dimensional topological superconductivity with attractive properties for experimental control and scalability.
arXiv comment17 pages, 16 figures, published version
References in corpus (56)
- Non-Abelian Anyons and Topological Quantum Computation
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
- 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
- Non-Abelian statistics and topological quantum information processing in 1D wire networks
- Majorana bound states in a coupled quantum-dot hybrid-nanowire system
- Realizing Majorana zero modes in superconductor-semiconductor heterostructures
- Introduction to topological superconductivity and Majorana fermions
- Scalable Designs for Quasiparticle-Poisoning-Protected Topological Quantum Computation with Majorana Zero Modes
- From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires
- Scaling of Majorana Zero-Bias Conductance Peaks
- Evidence of topological superconductivity in planar Josephson junctions
- Coulomb-assisted braiding of Majorana fermions in a Josephson junction array
- Measurement-Only Topological Quantum Computation
- Majorana box qubits
- Topological Superconductivity in a Planar Josephson Junction
- Non-Abelian operations on Majorana fermions via single charge control
- Zero-Energy Modes from Coalescing Andreev States in a Two-Dimensional Semiconductor-Superconductor Hybrid Platform
- Disordered Topological Insulators via -Algebras
- Quantized conductance doubling and hard gap in a two-dimensional semiconductor-superconductor heterostructure
- Topological superconductivity in full shell proximitized nanowires
- Flux-induced topological superconductivity in full-shell nanowires
- Flux-induced Majorana modes in full-shell nanowires
- Braiding without Braiding: Teleportation-Based Quantum Information Processing with Majorana Zero Modes
- Nontopological zero-bias peaks in full-shell nanowires induced by flux tunable Andreev states
- Hard superconducting gap in InSb nanowires
- Search for non-Abelian Majorana braiding statistics in superconductors
- Zero-field Topological Superconductivity in Ferromagnetic Hybrid Nanowires
- Estimating disorder and its adverse effects in semiconductor Majorana nanowires
- Relating Andreev Bound States and Supercurrents in Hybrid Josephson Junctions
- Revealing the magnetic proximity effect in EuS/Al bilayers through superconducting tunneling spectroscopy
- Epitaxial Pb on InAs nanowires
- Semiconductor - Ferromagnetic Insulator - Superconductor Nanowires: Stray Field and Exchange Field
- Shadow epitaxy for in-situ growth of generic semiconductor/superconductor devices
- Coupling-Matrix Approach to the Chern Number Calculation in Disordered Systems
- Transport studies of epi-Al/InAs 2DEG systems for required building-blocks in topological superconductor networks
- Coupling and braiding Majorana bound states in networks defined in proximitized two-dimensional electron gases
- Topological superconductivity in semiconductor-superconductor-magnetic insulator heterostructures
- Nonlocal conductance spectroscopy of Andreev bound states in gate-defined InAs/Al nanowires
- Electronic properties of InAs/EuS/Al hybrid nanowires
- Even-odd effect and Majorana states in full-shell nanowires
- Evidence for spin-polarized bound states in semiconductor-superconductor-ferromagnetic insulator islands
- Tunable proximity effects and topological superconductivity in ferromagnetic hybrid nanowires
- Topological superconductivity in nanowires proximate to a diffusive superconductor-magnetic insulator bilayer
- Effects of the electrostatic environment on superlattice Majorana nanowires
- Fusion rules in a Majorana single-charge transistor
- Charge transport through spin-polarized tunnel junction between two spin-split superconductors
- Topological superconductivity in tripartite superconductor-ferromagnet-semiconductor nanowires
- Majorana zero modes induced by superconducting phase bias
- Improved effective equation for the Rashba spin-orbit coupling in semiconductor nanowires
- Demonstrating Majorana non-Abelian properties using fast adiabatic charge-transfer
- Optimizing the topological properties of stacking semiconductor-ferromagnet-superconductor heterostructures
- Universal phase diagram of topological superconductors subjected to magnetic flux
- Minimal Zeeman field requirement for a topological transition in superconductors
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- Exceptional degeneracies in non-Hermitian Rashba semiconductors