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

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

2007-07-11

arxiv.org/abs/0707.1692v3

Phys. Rev. Lett. 100, 096407 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, published version

Scientific paper

10.1103/PhysRevLett.100.096407

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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