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      Superconducting proximity effect and Majorana fermions at the surface of a topological insulator

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          Abstract

          We study the proximity effect between an s-wave superconductor and the surface states of a strong topological insulator. The resulting two dimensional state resembles a spinless p_x+ip_y superconductor, but does not break time reversal symmetry. This state supports Majorana bound states at vortices. We show that linear junctions between superconductors mediated by the topological insulator form a non chiral 1 dimensional wire for Majorana fermions, and that circuits formed from these junctions provide a method for creating, manipulating and fusing Majorana bound states.

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          Journal
          10.1103/PhysRevLett.100.096407
          0707.1692

          Nanophysics
          Nanophysics

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