A zero-voltage conductance peak from weak antilocalization in a Majorana nanowire

By D. I. Pikulin, J. Dahlhaus, Michael Wimmer, Henning Schomerus, C. Beenakker. 2012

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We show that weak antilocalization by disorder competes with resonant Andreev reflection from a Majorana zero mode to produce a zero-voltage conductance peak of order e2/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 time-reversal symmetry and without requiring a topologically nontrivial phase. We identify methods of distinguishing the Majorana resonance from the weak antilocalization effect.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/386a785edf73a6e2811adcb4888a9191d232918a