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Zero-voltage conductance peak from weak antilocalization in a Majorana nanowire

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Article number125011
<mark>Journal publication date</mark>12/2012
<mark>Journal</mark>New Journal of Physics
<mark>Original language</mark>English


We show that weak antilocalization by disorder competes with
resonant Andreev reflection from a Majorana zero mode to produce a zerovoltage
conductance peak of order e^2/h in a superconducting nanowire. The
phase conjugation needed for quantum interference to survive a disorder
average is provided by particle–hole symmetry—in the absence of timereversal
symmetry and without requiring a topologically nontrivial phase. We
identify methods of distinguishing the Majorana resonance from the weak
antilocalization effect.