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

doi:10.1126/science.aag2792

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 journal › Article › peer-review

476 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 language	English (US)
Pages (from-to)	294-299
Number of pages	6
Journal	Science
Volume	357
Issue number	6348
DOIs	https://doi.org/10.1126/science.aag2792
State	Published - Jul 21 2017
Externally published	Yes

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He, Q. L., Pan, L., Stern, A. L., Burks, E. C., Che, X., Yin, G., Wang, J., Lian, B., Zhou, Q., Choi, E. S., Murata, K., Kou, X., Chen, Z., Nie, T., Shao, Q., Fan, Y., Zhang, S. C., Liu, K., Xia, J., & Wang, K. L. (2017). Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure. Science, 357(6348), 294-299. https://doi.org/10.1126/science.aag2792

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title = "Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure",

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.",

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

note = "Publisher Copyright: {\textcopyright} 2017 The Authors, some rights reserved.",

year = "2017",

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doi = "10.1126/science.aag2792",

language = "English (US)",

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T1 - Chiral Majorana fermion modes in a quantum anomalous Hall insulator–superconductor structure

AU - He, Qing Lin

AU - Pan, Lei

AU - Stern, Alexander L.

AU - Burks, Edward C.

AU - Che, Xiaoyu

AU - Yin, Gen

AU - Wang, Jing

AU - Lian, Biao

AU - Zhou, Quan

AU - Choi, Eun Sang

AU - Murata, Koichi

AU - Kou, Xufeng

AU - Chen, Zhijie

AU - Nie, Tianxiao

AU - Shao, Qiming

AU - Fan, Yabin

AU - Zhang, Shou Cheng

AU - Liu, Kai

AU - Xia, Jing

AU - Wang, Kang L.

PY - 2017/7/21

Y1 - 2017/7/21

N2 - 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.

AB - 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.

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SP - 294

EP - 299

JO - Science

JF - Science

IS - 6348

ER -

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

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