Observation of a Majorana zero mode in a topologically protected edge channel

Berthold Jäck, Yonglong Xie, Jian Li, Sangjun Jeon, B. Andrei Bernevig, Ali Yazdani

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

Superconducting proximity pairing in helical edge modes, such as those of topological insulators, is predicted to provide a unique platform for realizing Majorana zero modes (MZMs).We used scanning tunneling microscopy measurements to probe the influence of proximity-induced superconductivity and magnetism on the helical hinge states of bismuth(111) films grown on a superconducting niobium substrate and decorated with magnetic iron clusters. Consistent with model calculations, our measurements revealed the emergence of a localized MZM at the interface between the superconducting helical edge channel and the iron clusters, with a strong magnetization component along the edge. Our experiments also resolve the MZM's spin signature, which distinguishes it from trivial in-gap states that may accidentally occur at zero energy in a superconductor.

Original languageEnglish (US)
Pages (from-to)1255-1259
Number of pages5
JournalScience
Volume364
Issue number6447
DOIs
StatePublished - Jun 28 2019

All Science Journal Classification (ASJC) codes

  • General

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