Signatures of hybridization of multiple Majorana zero modes in a vortex

Liu, Tengteng1; Wan, Chun Yu2; Yang, Hao1; Zhao, Yujun2; Xie, Bangjin1; Zheng, Weiyan1; Yi, Zhaoxia1; Guan, Dandan1,3,4; Wang, Shiyong1,3,4; Zheng, Hao1,3,4; Liu, Canhua1,3,4; Fu, Liang5; Liu, Junwei2; Li, Yaoyi1,3,4; Jia, Jinfeng1,3,4,6

2024-08-01

10.1038/s41586-024-07857-4

NATURE   影响因子和分区

0028-0836

1476-4687

["Majorana zero modes (MZMs) are emergent zero-energy topological quasiparticles that are their own antiparticles1,2. Detected MZMs are spatially separated and electrically neutral, so producing hybridization between MZMs is extremely challenging in superconductors3,4. Here, we report the magnetic field response of vortex bound states in superconducting topological crystalline insulator SnTe (001) films. Several MZMs were predicted to coexist in a single vortex due to magnetic mirror symmetry. Using a scanning tunnelling microscope equipped with a three-axis vector magnet, we found that the zero-bias peak (ZBP) in a single vortex exhibits an apparent anisotropic response even though the magnetic field is weak. The ZBP can robustly extend a long distance of up to approximately 100 nm at the (001) surface when the magnetic field is parallel to the (110\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$1\\bar{1}0$$\\end{document})-type mirror plane, otherwise it displays an asymmetric splitting. Our systematic simulations demonstrate that the anisotropic response cannot be reproduced with trivial ZBPs. Although the different MZMs cannot be directly distinguished due to the limited energy resolution in our experiments, our comparisons between experimental measurements and theoretical simulations strongly support the existence and hybridization of symmetry-protected multiple MZMs. Our work demonstrates a way to hybridize different MZMs by controlling the orientation of the magnetic field and expands the types of MZM available for tuning topological states.","We observe signatures of the existence and hybridization of multiple Majorana zero modes in a single vortex."]

SCI

英语

通讯

Ministry of Science and Technology of China["2019YFA0308600","2021YFA1401500","2020YFA0309000"] ; National Natural Science Foundation of China["11861161003","12104293","92365302","22325203","92265105","92065201","12074247","12174252"] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB28000000] ; Science and Technology Commission of Shanghai Municipality["19JC1412701","2019SHZDZX01","20QA1405100"] ; Innovation Program for Quantum Science and Technology[2021ZD0302500] ; China National Postdoctoral Program for Innovative Talents[BX2021185] ; Hong Kong Research Grants Council["N_HKUST626/18","26302118","16305019"]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:001301256200011

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Web of Science

1.Shanghai Jiao Tong Univ, Minist Educ, Key Lab Artificial Struct & Quantum Control, Tsung Dao Lee Inst,Sch Phys & Astron, Shanghai, Peoples R China
2.Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Peoples R China
3.Shanghai Res Ctr Quantum Sci, Shanghai, Peoples R China
4.Hefei Natl Lab, Hefei, Peoples R China
5.MIT, Dept Phys, Cambridge, MA USA
6.Southern Univ Sci & Technol, Dept Phys, Shenzhen, Peoples R China

Liu, Tengteng,Wan, Chun Yu,Yang, Hao,et al. Signatures of hybridization of multiple Majorana zero modes in a vortex[J]. NATURE,2024.

Liu, Tengteng.,Wan, Chun Yu.,Yang, Hao.,Zhao, Yujun.,Xie, Bangjin.,...&Jia, Jinfeng.(2024).Signatures of hybridization of multiple Majorana zero modes in a vortex.NATURE.

Liu, Tengteng,et al."Signatures of hybridization of multiple Majorana zero modes in a vortex".NATURE (2024).