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dc.contributor.authorWang, Zhiweien_US
dc.contributor.authorJiang, Yu-Xiaoen_US
dc.contributor.authorYin, Jia-Xinen_US
dc.contributor.authorLi, Yongkaien_US
dc.contributor.authorWang, Guan-Yongen_US
dc.contributor.authorHuang, Hai-Lien_US
dc.contributor.authorShao, Senen_US
dc.contributor.authorLiu, Jinjinen_US
dc.contributor.authorZhu, Pengen_US
dc.contributor.authorShumiya, Nanaen_US
dc.contributor.authorMd Shafayat Hossainen_US
dc.contributor.authorLiu, Hongxiongen_US
dc.contributor.authorShi, Youguoen_US
dc.contributor.authorDuan, Junxien_US
dc.contributor.authorLi, Xiangen_US
dc.contributor.authorChang, Guoqingen_US
dc.contributor.authorDai, Pengchengen_US
dc.contributor.authorYe, Zijinen_US
dc.contributor.authorXu, Gangen_US
dc.contributor.authorWang, Yanchaoen_US
dc.contributor.authorZheng, Haoen_US
dc.contributor.authorJia, Jinfengen_US
dc.contributor.authorM. Zahid Hasanen_US
dc.contributor.authorYao, Yuguien_US
dc.identifier.citationWang, Z., Jiang, Y., Yin, J., Li, Y., Wang, G., Huang, H., Shao, S., Liu, J., Zhu, P., Shumiya, N., Md Shafayat Hossain, Liu, H., Shi, Y., Duan, J., Li, X., Chang, G., Dai, P., Ye, Z., Xu, G., ...Yao, Y. (2021). Electronic nature of chiral charge order in the kagome superconductor CsV₃Sb₅. Physical Review B, 104(7), 075148-.
dc.description.abstractKagome superconductors with TC up to 7 K have been discovered for over 40 y. Recently, unconventional chiral charge order has been reported in kagome superconductor KV3Sb5, with an ordering temperature of one order of magnitude higher than the TC. However, the chirality of the charge order has not been reported in the cousin kagome superconductor CsV3Sb5, and the electronic nature of the chirality remains elusive. In this paper, we report the observation of electronic chiral charge order in CsV3Sb5 via scanning tunneling microscopy (STM). We observe a 2 × 2 charge modulation and a 1 × 4 superlattice in both topographic data and tunneling spectroscopy. 2 × 2 charge modulation is highly anticipated as a charge order by fundamental kagome lattice models at van Hove filling, and is shown to exhibit intrinsic chirality. We find that the 1 × 4 superlattices form various small domain walls, and can be a surface effect as supported by our first-principles calculations. Cru- cially, we find that the amplitude of the energy gap opened by the charge order exhibits real-space modulations, and features 2 × 2 wave vectors with chirality, highlighting the electronic nature of the chiral charge order. STM study at 0.4 K reveals a superconducting energy gap with a gap size 2􏰀 = 0.85 meV , which estimates a moderate superconductivity coupling strength with 2􏰀/kBTC = 3.9. When further applying a c-axis magnetic field, vortex core bound states are observed within this gap, indicative of clean-limit superconductivity.en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relation.ispartofPhysical Review Ben_US
dc.rights© 2021 American Physical Society. All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society.en_US
dc.titleElectronic nature of chiral charge order in the kagome superconductor CsV₃Sb₅en_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsKagome Superconductoren_US
dc.subject.keywordsTopological Materialsen_US
dc.description.acknowledgementThe work at Beijing Institute of Technology was sup- ported by the National Key R&D Program of China (Grant No. 2020YFA0308800), the Natural Science Foun- dation of China (Grants No. 92065109, No. 11734003, and No. 12061131002), the Beijing Natural Science Foundation (Grant No. Z190006), and the Beijing Institute of Technology (BIT) Research Fund Program for Young Scholars (Grant No. 3180012222011). Z.W. thanks the Analysis & Testing Center at BIT for assistance in facility support. Experimental and theoretical work at Princeton University was supported by the Gordon and Betty Moore Foundation [Grants No. GBMF4547 and No. GBMF9461 (M.Z.H.)]. Y.S. was supported by the National Natural Science Foundation of China (Grant No. U2032204), and the K. C. Wong Education Foundation (Grant No. GJTD-2018-01). G.C. would like to acknowledge the support of the National Research Foundation, Singapore under its NRF Fellowship Award No. NRF-NRFF13-2021- 0010 and the Nanyang Assistant Professorship grant from Nanyang Technological University. P.D. is supported the U.S. Department of Energy (DOE), Basic Energy Sciences (BES), under Contract No. DE-SC0012311. S.S. and Y.W. were supported by the National Natural Science Foundation of China under Grants No. 11822404 and No. 11774127.en_US
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