Coulomb-interaction-induced Majorana edge modes in nanowires

Abstract

We show that Majorana edge modes appear in a strongly correlated phase of semiconducting nanowires with discrete rotational symmetry in the cross section. These modes exist in the absence of spin-orbit coupling, magnetic fields and superconductivity. They appear purely due to the combination of the three-dimensional Coulomb interaction and orbital physics, which generates a fermionic condensate exhibiting a topological ground state degeneracy in a sector of the spectrum which is gapped to continuum modes. The gap can be comparable in magnitude to the topological superconducting gap in other solid-state candidate systems for Majorana edge modes, and may similarly be probed via tunnel spectroscopy.

arXiv comment6 pages, 3 figures, 12 pages supplemental material

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Cited by in corpus (6)

• Electron correlation effects in superconducting nanowires in and out of equilibrium
• Two-fluid coexistence and phase separation in a one dimensional model with pair hopping and density interactions
• Majorana Zero Modes in Fermionic Wires coupled by Aharonov-Bohm Cages
• A proposal for realizing Majorana fermions without external magnetic field in strongly correlated nanowires
• Sub-gap Fano resonances in a topological superconducting wire with on-site Coulomb interactions
• Symmetry-protected spin gaps in quantum wires