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

D. I. Pikulin; J. P. Dahlhaus; M. Wimmer; H. Schomerus; C. W. J. Beenakker

doi:10.1088/1367-2630/14/12/125011

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arXiv · 1206.6687

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

D. I. Pikulin·J. P. Dahlhaus·M. Wimmer·H. Schomerus·C. W. J. Beenakker

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Abstract

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 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 time-reversal symmetry and without requiring a topologically nontrivial phase. We identify methods to distinguish the Majorana resonance from the weak antilocalization effect.

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D. I. Pikulin, J. P. Dahlhaus, M. Wimmer, H. Schomerus, C. W. J. Beenakker. 2014-02-19. Zero-voltage conductance peak from weak antilocalization in a Majorana nanowire. https://doi.org/10.1088/1367-2630%2F14%2F12%2F125011

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