Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure

Qing Lin He, Lei Pan, Alexander L. Stern, Edward C. Burks, Xiaoyu Che, Gen Yin, Jing Wang, Biao Lian, Quan Zhou, Eun Sang Choi, Koichi Murata, Xufeng Kou, Zhijie Chen, Tianxiao Nie, Qiming Shao, Yabin Fan, Shou Cheng Zhang, Kai Liu, Jing Xia, Kang L. Wang

Research output: Contribution to journalArticlepeer-review

300 Scopus citations

Abstract

Majorana fermion is a hypothetical particle that is its own antiparticle. We report transport measurements that suggest the existence of one-dimensional chiral Majorana fermion modes in the hybrid system of a quantum anomalous Hall insulator thin film coupled with a superconductor. As the external magnetic field is swept, half-integer quantized conductance plateaus are observed at the locations of magnetization reversals, giving a distinct signature of the Majorana fermion modes. This transport signature is reproducible over many magnetic field sweeps and appears at different temperatures. This finding may open up an avenue to control Majorana fermions for implementing robust topological quantum computing.

Original languageEnglish (US)
Pages (from-to)294-299
Number of pages6
JournalScience
Volume357
Issue number6348
DOIs
StatePublished - Jul 21 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General

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