Proposal for realizing Majorana fermions in chains of magnetic atoms on a superconductor
We propose an easy-to-build easy-to-detect scheme for realizing Majorana fermions at the ends of a chain of magnetic atoms on the surface of a superconductor. Model calculations show that such chains can be easily tuned between trivial and topological ground states. In the latter, spatially resolved spectroscopy can be used to probe the Majorana fermion end states. Decoupled Majorana bound states can form even in short magnetic chains consisting of only tens of atoms. We propose scanning tunneling microscopy as the ideal technique to fabricate such systems and to probe their topological properties.
Additional Information© 2013 American Physical Society. Received 18 January 2013; published 25 July 2013. We thank R. Lutchyn and J. Seo for the discussions. This work was supported by NSF-DMR1104612 and NSF MRSEC programs through the Princeton Center for Complex Materials (Grant No. DMR-0819860), ONR, ARO, and DARPA-SPAWAR Grant No. N6601-11-1-4110. S.N.-P. acknowledges support from the European Community under a Marie-Curie OEF fellowship. B.A.B. acknowledges support from the programs CAREER Grants No. DMR-095242, No. ONR-N00014-11-1-0635, and No. ARMY-245-6778 and the Packard Foundation.
Published - PhysRevB.88.020407.pdf
Submitted - 1303.6363.pdf