Abstract
The kagome superconductor CsV3Sb5 has attracted widespread attention due to its rich correlated electron states in-cluding superconductivity,charge density wave(CDW),nematicity,and pair density wave.Notably,the modulation of the intertwined electronic orders by the chemical doping is significant to illuminate the cooperation/competition between multi-ple phases in kagome superconductors.In this study,we have synthesized a series of tantalum-substituted Cs(V1-xTax)3Sb5 by a modified self-flux method.Electrical transport measurements reveal that CDW is suppressed gradually and becomes undetectable as the doping content of x is over 0.07.Concurrently,the superconductivity is enhanced monotonically from Tc～2.8 K at x=0 to 5.2 K at x=0.12.Intriguingly,in the absence of CDW,Cs(V1-xTax)3Sb5(x=0.12)crystals exhibit a pronounced two-fold symmetry of the in-plane angular-dependent magnetoresistance(AMR)in the superconduct-ing state,indicating the anisotropic superconducting properties in the Cs(V1-xTax)3Sb5.Our findings demonstrate that Cs(V1-xTax)3Sb5 with the non-trivial band topology is an excellent platform to explore the superconductivity mechanism and intertwined electronic orders in quantum materials.
基金项目
National Key R&D Program of China(2022YFA1204100)
National Natural Science Foundation of China(62488201)
Chinese Academy of Sciences(XDB33030000)
Chinese Academy of Sciences(ZDBS-SSW-WHC001)
Chinese Academy of Sciences(YSBR-003)
Chinese Academy of Sciences(YSBR-053)
Innovation Program of Quantum Science and Technology(2021ZD0302700)
NETL
NSTL
万方数据