Majorana Fermions in Proximity-coupled Topological Insulator Nanowires

Abstract

A topological insulator nanowire, proximity-coupled to an ordinary bulk s-wave superconductor and subject to a longitudinal applied magnetic field, is shown to realize a one-dimensional topological superconductor with unpaired Majorana fermions localized at both ends. This situation occurs under a wide range of conditions and constitutes what is possibly the most easily accessible physical realization of the elusive Majorana particles in a solid-state system.

4 pages + 4 figures. v2 to appear in PRB/RC. For related work and info visit http://www.physics.ubc.ca/~franz/

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