Majorana states and devices in magnetic structures

Abstract

The pursuit for Majorana fermions is one of the top priorities in condensed matter physics at the moment. In this work we propose a new method of fabricating Majorana Josephson devices in systems with a weak or no spin-orbit coupling and without external magnetic fields. Our proposal is based on curved semiconductor wires in the proximity of superconducting elements and a small number of nanomagnets. With this method it is possible to fabricate devices that are not feasible by employing straight topological wire segments. The proposed method is naturally scalable and opens up a possibility for a systematic fabrication of arrays of Majorana states where a pair of Majorana states is obtained from a single magnet.

4.5 pages, 5 Figs

References in corpus (10)

• 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
• Classification of topological insulators and superconductors in three spatial dimensions
• Evidence of Majorana fermions in an Al - InAs nanowire topological superconductor
• Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
• Spin-selective Peierls transition in interacting one-dimensional conductors with spin-orbit interaction
• Transition from fractional to Majorana fermions in Rashba nanowires
• Quantum dot spectroscopy of proximity-induced superconductivity in a two-dimensional electron gas

Cited by in corpus (8)

• Majorana states in helical Shiba chains and ladders
• Topological properties of helical Shiba chains with general impurity strength and hybridization
• Tuning topological superconductivity in helical Shiba chains by supercurrent
• Designing Nanomagnet Arrays for Topological Nanowires in Si
• 1D Majorana Goldstinos and partial supersymmetry breaking in quantum wires
• Majorana bound states in nanowire-superconductor hybrid systems in periodic magnetic fields
• Dispersive 1D Majorana modes with emergent supersymmetry in 1D proximitized superconductors via spatially-modulated potentials and magnetic fields
• Platform for controllable Majorana zero modes using superconductor/ferromagnet heterostructures