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

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

doi:10.1126/science.aag2792

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

Journal Article · 21 July 2017 · Science

DOI: https://doi.org/10.1126/science.aag2792 · OSTI ID:1374388

^[1]; Pan, Lei ^[1]; Stern, Alexander L. ^[2]; Burks, Edward C. ^[3]; Che, Xiaoyu ^[1]; Yin, Gen ^[1];

^[4]; Lian, Biao ^[5];

^[5]; Choi, Eun Sang ^[6]; Murata, Koichi ^[1];

^[7];

^[3];

^[1];

^[1]; Fan, Yabin ^[1];

^[5];

^[3]; Xia, Jing ^[2];

^[8]

Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering, and Computer Engineering, Dept. of Physics, and Dept. of Materials Science and Engineering
Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
Univ. of California, Davis, CA (United States). Dept. of Physics
Fudan Univ., Shanghai (China). State Key Lab. of Surface Physics, Dept. of Physics; Stanford Univ., CA (United States). Dept. of Physics
Stanford Univ., CA (United States). Dept. of Physics
Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering, and Computer Engineering, Dept. of Physics, and Dept. of Materials Science and Engineering; ShanghaiTech Univ., Shanghai (China). School of Information Science and Technology
Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering, and Computer Engineering, Dept. of Physics, and Dept. of Materials Science and Engineering; King Abdulaziz City for Science and Technology (KACST), Riyadh (Saudi Arabia). Center of Excellence in Green Nanotechnology

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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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE; National Science Foundation (NSF)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1374388

Journal Information:: Science, Vol. 357, Issue 6348; ISSN 0036-8075

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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Synthetic Weyl Points and Chiral Anomaly in Majorana Devices with Nonstandard Andreev-Bound-State Spectra Kotetes, Panagiotis; Mercaldo, Maria Teresa; Cuoco, Mario arXiv https://doi.org/10.48550/arxiv.1901.00876	text	January 2019
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Geometric quenching of orbital pair breaking in a single crystalline superconducting nanomesh network Nam, Hyoungdo; Chen, Hua; Adams, Philip W. Nature Communications, Vol. 9, Issue 1 https://doi.org/10.1038/s41467-018-07778-7	journal	December 2018
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Circular dichroism of chiral Majorana states Osca, Javier; Serra, Llorenç Beilstein Journal of Nanotechnology, Vol. 9 https://doi.org/10.3762/bjnano.9.110	journal	January 2018
Delocalisation of Majorana quasiparticles in plaquette--nanowire hybrid system Kobiałka, Aksel; Domański, Tadeusz; Ptok, Andrzej arXiv https://doi.org/10.48550/arxiv.1808.05281	text	January 2018
Definite photon deflections of topological defects in metasurfaces and symmetry-breaking phase transitions with material loss Sheng, Chong; Liu, Hui; Chen, Huanyang arXiv https://doi.org/10.48550/arxiv.1810.06280	text	January 2018

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