Majorana fermions in spin-orbit coupled ferromagnetic Josephson junctions

Details Majorana fermions in spin-orbit coupled ferromagnetic Josephson junctions Majorana fermions in spin-orbit coupled ferromagnetic Josephson junctions

2011-06-09

arxiv.org/abs/1106.1801v2

Phys. Rev. B 84, 180509(R) (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures. Published version

Scientific paper

We study all possible Majorana modes in two-dimensional spin-orbit coupled ferromagnetic superconductor-normal state-superconductor (SNS) Josephson junctions and propose experiments to detect them. With the S region in a non-trivial topological phase and a superconducting phase difference $\phi = \pi$ across the junction, two delocalized Majorana fermions with no excitation gap appear in the N region. In addition, if S and N belong to different topological phases and have well-separated the Fermi surfaces, localized Majorana fermions with a finite excitation gap also emerge at both SN interfaces for all $\phi$.

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