Coherent transport through a Majorana island in an Aharonov-Bohm interferometer

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  • A. M. Whiticar
  • A. Fornieri
  • E. C. T. O'Farrell
  • A. C. C. Drachmann
  • T. Wang
  • C. Thomas
  • S. Gronin
  • R. Kallaher
  • G. C. Gardner
  • M. J. Manfra
  • Marcus, Charles M.
  • F. Nichele

Majorana zero modes are leading candidates for topological quantum computation due to non-local qubit encoding and non-abelian exchange statistics. Spatially separated Majorana modes are expected to allow phase-coherent single-electron transport through a topological superconducting island via a mechanism referred to as teleportation. Here we experimentally investigate such a system by patterning an elongated epitaxial InAs-Al island embedded in an Aharonov-Bohm interferometer. With increasing parallel magnetic field, a discrete sub-gap state in the island is lowered to zero energy yielding persistent 1e-periodic Coulomb blockade conductance peaks (e is the elementary charge). In this condition, conductance through the interferometer is observed to oscillate in a perpendicular magnetic field with a flux period of h/e (h is Planck's constant), indicating coherent transport of single electrons through the islands, a signature of electron teleportation via Majorana modes. Theories predict teleportation of phase-coherent single electrons through a topological superconducting island. Here, the authors report persistent Coulomb blockade conductance peaks due to coherent transport of single electrons through patterned InAs-Al islands embedded in an Aharonov-Bohm interferometer.

Original languageEnglish
JournalNature Communications
Issue number1
Number of pages6
Publication statusPublished - 25 Jun 2020

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