A proposal for realizing Majorana fermions without external magnetic field in strongly correlated nanowires

Kaushal Kumar Kesharpu; Evgenii A. Kochetov; Alvaro Ferraz

doi:10.1103/physrevb.109.115140

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arXiv · 2310.10201

A proposal for realizing Majorana fermions without external magnetic field in strongly correlated nanowires

Kaushal Kumar Kesharpu·Evgenii A. Kochetov·Alvaro Ferraz

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Abstract

We show that one dimensional (1D) topological superconductivity can be placed in the context of phenomena associated with strongly correlated electron systems. Here we propose a system consisting of a one-dimensional chain of strongly correlated fermions placed on a superconducting (SC) substrate that exhibits a spin-singlet extended $s$-wave pairing. Strong electron correlation is shown to transform an extended $s$-wave SC into a topological SC that hosts Majorana fermions. In contrast to the approaches based on mean-field treatments, no Zeeman or exchange magnetic field is needed to produce such an effect.

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Kaushal Kumar Kesharpu, Evgenii A. Kochetov, Alvaro Ferraz. 2023-10-16. A proposal for realizing Majorana fermions without external magnetic field in strongly correlated nanowires. https://doi.org/10.1103/physrevb.109.115140

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