Majorana fermions at odd junctions in a wire network of ferromagnetic impurities
2016 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 94, no 10, 100501Article in journal (Refereed) Published
We consider a wire network of ferromagnetic impurities on the surface of an s-wave superconductor with a strong Rashba spin-orbit interaction. Within the topological phase, zero-energy Majorana fermions appear at the wire end points as well as at junctions between an odd number of wire segments, while no clearly isolated subgap states are present at junctions between an even number of wire segments, providing strong, experimentally accessible signatures for Majorana fermions. We also investigate the quasiparticle energy gap with respect to varying the Rashba spin-orbit coupling and magnetic impurity strength.
Place, publisher, year, edition, pages
2016. Vol. 94, no 10, 100501
Condensed Matter Physics Physical Sciences
IdentifiersURN: urn:nbn:se:uu:diva-305208DOI: 10.1103/PhysRevB.94.100501ISI: 000383231600002OAI: oai:DiVA.org:uu-305208DiVA: diva2:1034716
FunderSwedish Research CouncilSwedish Foundation for Strategic Research Göran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of Technology