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arXiv · 1809.09564

Coulomb-interaction-induced Majorana edge modes in nanowires

Tommy Li·Michele Burrello·Karsten Flensberg
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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.

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Tommy Li, Michele Burrello, Karsten Flensberg. 2018-09-25. Coulomb-interaction-induced Majorana edge modes in nanowires. https://doi.org/10.1103/physrevb.100.045305

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