start-ver=1.4 cd-journal=joma no-vol=137 cd-vols= no-issue=9 article-no= start-page=096003 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2026 dt-pub=20260828 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Strain-Tuned Nodal Superconductivity in the Charge-Ordered Kagome Metal CsV3?Sb5 en-subtitle= kn-subtitle= en-abstract= kn-abstract=The nature of the superconducting pairing symmetry in the kagome metal CsV3?Sb5 and its relationship with the charge density wave (CDW) order are central unresolved issues. Here, we investigate the evolution of superconductivity in CsV3?Sb5 under in situ uniaxial pressure using 121Sb nuclear quadrupole resonance (NQR). We find that tensile strain significantly enhances the superconducting transition temperature, ?c, while the CDW remains unchanged, demonstrating that superconductivity can be tuned independently of the bulk charge order. At a tensile strain of ? =+0.90%, the nuclear spin-lattice relaxation rate reveals a remarkable double transition: an upper transition at ?c?1=3.6??K to a nodal gap state, and a lower one at ?c?2=3.0??K characterized by a nodeless gap. These results evidence degenerate superconducting states with different gap symmetry in the kagome metal at ambient pressure which split under strain. Our Letter demonstrates a high tunability of superconductivity by uniaxial pressure. en-copyright= kn-copyright= en-aut-name=TakeuchiYusuke en-aut-sei=Takeuchi en-aut-mei=Yusuke kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=KobayashiAkito en-aut-sei=Kobayashi en-aut-mei=Akito kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=UchidaSaki en-aut-sei=Uchida en-aut-mei=Saki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=NagaoTakumi en-aut-sei=Nagao en-aut-mei=Takumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=OgawaSeigo en-aut-sei=Ogawa en-aut-mei=Seigo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=ZhouRui en-aut-sei=Zhou en-aut-mei=Rui kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=KawasakiShinji en-aut-sei=Kawasaki en-aut-mei=Shinji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=SongFei en-aut-sei=Song en-aut-mei=Fei kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= en-aut-name=NiHao en-aut-sei=Ni en-aut-mei=Hao kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=9 ORCID= en-aut-name=ZhaoYong en-aut-sei=Zhao en-aut-mei=Yong kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=10 ORCID= en-aut-name=ZhengGuo-qing en-aut-sei=Zheng en-aut-mei=Guo-qing kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=11 ORCID= affil-num=1 en-affil=Department of Physics, Okayama University kn-affil= affil-num=2 en-affil=Department of Physics, Okayama University kn-affil= affil-num=3 en-affil=Department of Physics, Okayama University kn-affil= affil-num=4 en-affil=Department of Physics, Okayama University kn-affil= affil-num=5 en-affil=Department of Physics, Okayama University kn-affil= affil-num=6 en-affil=Institute of Physics, Chinese Academy of Sciences, and Beijing National Laboratory for Condensed Matter Physics kn-affil= affil-num=7 en-affil=Department of Physics, Okayama University kn-affil= affil-num=8 en-affil=Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, College of Physics and Energy, Fujian Normal University kn-affil= affil-num=9 en-affil=Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, College of Physics and Energy, Fujian Normal University kn-affil= affil-num=10 en-affil=Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, College of Physics and Energy, Fujian Normal University kn-affil= affil-num=11 en-affil=Department of Physics, Okayama University kn-affil= END start-ver=1.4 cd-journal=joma no-vol=15 cd-vols= no-issue=1 article-no= start-page=5082 end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=2024 dt-pub=20240614 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Strain-induced long-range charge-density wave order in the optimally doped Bi2Sr2-x Lax CuO6 superconductor en-subtitle= kn-subtitle= en-abstract= kn-abstract=The mechanism of high-temperature superconductivity in copper oxides (cuprate) remains elusive, with the pseudogap phase considered a potential factor. Recent attention has focused on a long-range symmetry-broken charge-density wave (CDW) order in the underdoped regime, induced by strong magnetic fields. Here by Cu-63,Cu-65-nuclear magnetic resonance, we report the discovery of a long-range CDW order in the optimally doped Bi2Sr2-xLaxCuO6 superconductor, induced by in-plane strain exceeding divided by epsilon divided by = 0.15 %, which deliberately breaks the crystal symmetry of the CuO2 plane. We find that compressive/tensile strains reduce superconductivity but enhance CDW, leaving superconductivity to coexist with CDW. The findings show that a long-range CDW order is an underlying hidden order in the pseudogap state, not limited to the underdoped regime, becoming apparent under strain. Our result sheds light on the intertwining of various orders in the cuprates. en-copyright= kn-copyright= en-aut-name=KawasakiShinji en-aut-sei=Kawasaki en-aut-mei=Shinji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=TsukudaNao en-aut-sei=Tsukuda en-aut-mei=Nao kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=LinChengtian en-aut-sei=Lin en-aut-mei=Chengtian kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=ZhengGuo-Qing en-aut-sei=Zheng en-aut-mei=Guo-Qing kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil=Department of Physics, Okayama University kn-affil= affil-num=2 en-affil=Department of Physics, Okayama University kn-affil= affil-num=3 en-affil=Max-Planck-Institut fur Festkorperforschung kn-affil= affil-num=4 en-affil=Department of Physics, Okayama University kn-affil= END