Stripe charge order and its interaction with Majorana bound states in 2M-WS2 topological superconductors

作     者：Xuemin Fan Xiao-Qi Sun Penghao Zhu Yuqiang Fang Yongkang Ju Yonghao Yuan Jingming Yan Fuqiang Huang Taylor L.Hughes Peizhe Tang Qi-Kun Xue Wei Li Xuemin Fan;Xiao-Qi Sun;Penghao Zhu;Yuqiang Fang;Yongkang Ju;Yonghao Yuan;Jingming Yan;Fuqiang Huang;Taylor L.Hughes;Peizhe Tang;Qi-Kun Xue;Wei Li

作者机构：State Key Laboratory of Low-Dimensional Quantum PhysicsDepartment of PhysicsTsinghua University Frontier Science Center for Quantum Information Collaborative Innovation Center of Quantum Matter Institute for Condensed Matter Physics and Department of Physics University of Illinois at Urbana-Champaign State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University School of Materials Science and Engineering Beihang University Max Planck Institute for the Structure and Dynamics of Matter Center for Free-Electron Laser Science Beijing Academy of Quantum Information Sciences Southern University of Science and Technology 

出 版 物：《National Science Review》 (国家科学评论(英文版))

年 卷 期：2025年第12卷第2期

页      面：42-49页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(92365201, 52388201, 12234011, 11427903 and 12374053) the Ministry of Science and Technology of China(2022YFA1403100) the Tsinghua University Initiative Scientific Research Program(to W.L.) the Beijing Young Talents Plan(to W.L.) the National Thousand-Young-Talents Program(to W.L.) the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics(to P.T.) ARO MURI(W911NF2020166 to P.Z. and T.H.) the Gordon and Betty Moore Foundation’s EPiQS Initiative(GBMF8691 to X.S.) 

主　　题：Majorana bound states 2M-WS stripe charge order topological superconductor 

摘      要：To achieve logic operations via Majorana braiding, positional control of the Majorana bound states（MBSs）must be established. Here we report the observation of a striped surface charge order coexisting with superconductivity and its interaction with the MBS in the topological superconductor 2M-WS2, using low-temperature scanning tunneling microscopy. By applying an out-of-plane magnetic field, we observe that MBSs are absent in vortices in the region with stripe order. This is in contrast to adjacent underlaying layers without charge order, where vortex-bound MBSs are observed. Via theoretical simulations, we show that the surface stripe order does not destroy the bulk topology, but it can effectively modify the spatial distribution of MBSs, i.e. it pushes them downward, away from the 2M-WS2surface. Our findings demonstrate that the interplay of charge order and topological superconductivity can potentially be used to tune the positions of MBSs, and to explore new states of matter.