Majorana fermions and odd-frequency Cooper pairs in a normal-metal nanowire proximity-coupled to a topological superconductor

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We discuss a strong relationship between Majorana fermions and odd-frequency Cooper pairs which appear at a disordered normal (N) nanowire attached to a topologically nontrivial superconducting (S) one. The transport properties in superconducting nanowire junctions show universal behaviors irrespective of the degree of disorder: the quantized zero-bias differential conductance at 2e(2)/h in NS junction and the fractional current-phase (J-phi) relationship of the Josephson effect in SNS junction J alpha sin(phi/2). Such behaviors are exactly the same as those found in the anomalous proximity effect of odd-parity spin-triplet superconductors. We show that the odd-frequency pairs exist wherever the Majorana fermions stay. DOI: 10.1103/PhysRevB.87.104513

Journal

  • Physical Review B

    Physical Review B 87 (10), 104513-, 2013-03-15

    American Physical Society

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