Unconventional Josephson Signatures of Majorana Bound States
Liang Jiang, David Pekker, Jason Alicea, Gil Refael, Yuval Oreg, Felix von Oppen
DOI 10.1103/PhysRevLett.107.236401 · Physical Review Letters
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Abstract
A junction between two topological superconductors containing a pair of Majorana fermions exhibits a “fractional” Josephson effect, 4π periodic in the superconductors’ phase difference. An additional fractional Josephson effect, however, arises when the Majorana fermions are spatially separated by a superconducting barrier. This new term gives rise to a set of Shapiro steps which are essentially absent without Majorana modes and therefore provides a unique signature for these exotic states.
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