## Direct Observation of Majorana Mode |

TYPE | Colloquium |

Speaker: | Prof. Moty Heiblum |

Affiliation: | Weizmann Institute of Science |

Organizer: | Yoav Sagi |

Date: | 25.04.2022 |

Time: | 14:30 - 15:30 |

Location: | Lidow Rosen Auditorium (323) |

Abstract: |
Moty Heiblum
Quantum Hall states – the progenitors of the growing family of topological insulators – are also a source of exotic quantum states. These states can be abelian (e.g., integers & fractions) or non-abelian (e.g., special fractions)., and thus may host electrons, fractionally charged quasiparticles, and neutral bosonic or Majorana (in general, para-fermionic) quasiparticles. Since the bulk is insulating (with the quasiparticles localized), counter-propagating gapless edge modes mirror the bulk’s topological order (due to ‘bulk-edge’ correspondence). The most theoretically studied non-abelian state has a filling =5/2. The state supports charge-neutral quasiparticles accompanied by Identifying the correct topological order is crucial in testing the numerical predictions. While such experiments are more complicated than the ubiquitous conductance measurements, their ‘power’ is already evident. Moreover, isolating the fractional channel can be most helpful in complex interference (braiding) experiments. Banerjee et al, Nature. 545, 7652, 75-79 (2017) |