Topological superconductivity in Rashba semiconductors without a Zeeman field

Abstract

In this manuscript I present new hybrid devices based on multi-wire/channel Rashba semiconductors, which harbor Majorana fermions (MFs) without a Zeeman field. In contrast, magnetic fluxes, supercurrents or electric fields can be employed, yielding an enhanced device manipulability. The generic topological phase diagram for two-nanowire/channel systems exhibits features of quantum criticality and a rich interplay of phases with 0, 1 or 2 MFs per edge. The most prominent and experimentally feasible implementation relies on the already existing platforms of InAs-2DEG on top of a Josephson junction. Appropriate design of the latter device allows phases with 1 or 2 MFs, both detectable in zero-bias anomaly peaks with a single or double unit of conductance.

11 pages including 3 appendices and 5 panels with 12 figures in total; accepted version to appear in Phys. Rev. B

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Cited by in corpus (23)

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• Two-dimensional platform for networks of Majorana bound states
• Flux-induced topological superconductivity in full-shell nanowires
• Topological superconductivity in full shell proximitized nanowires
• Flux-induced Majorana modes in full-shell nanowires
• Majorana nanowires for topological quantum computation
• Synthetic Weyl Points and Chiral Anomaly in Majorana Devices with Nonstandard Andreev-Bound-State Spectra
• No-go theorem for a time-reversal invariant topological phase in noninteracting systems coupled to conventional superconductors
• Supercurrent-induced Majorana bound states in a planar geometry
• Nodal Andreev Spectra in Multi-Majorana Three-Terminal Josephson Junctions
• Magnetic-Field-Induced Topological Reorganization of a P-wave Superconductor
• Three-phase Majorana zero modes at tiny magnetic fields
• One-dimensional topological superconductivity based entirely on phase control
• Majorana zero modes induced by superconducting phase bias
• Synthesizing Majorana zero-energy modes in a periodically gated quantum wire
• Magnetic manipulation of topological states in p-wave superconductors
• Majorana fermions in topological insulator nanowires: from single superconducting nanowires to Josephson junctions
• Beyond the standard model of topological Josephson junctions: From crystalline anisotropy to finite-size and diode effects
• Magnetic flux induced higher-order topological superconductivity
• Topological phase transitions in superconductors with chiral symmetry
• Magnetic flux induced topological superconductivity in magnetic atomic rings
• Majorana Braiding Racetracks from Charge Chern Insulator - Superconductor Hybrids
• Realizing Majorana Kramers pairs in two-channel InAs-Al nanowires with highly misaligned electric fields