首页|Two-fold symmetry of the in-plane resistance in kagome superconductor Cs(V1-xTax)3Sb5 with enhanced superconductivity

Two-fold symmetry of the in-plane resistance in kagome superconductor Cs(V1-xTax)3Sb5 with enhanced superconductivity

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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.

kagome superconductorcharge density waverotation symmetry breaking

赵振、王汝文、张宇航、祝轲、余维琪、韩烨超、刘家利、胡国静、郭辉、林晓、董晓莉、陈辉、杨海涛、高鸿钧

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Beijing National Center for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

Songshan Lake Materials Laboratory,Dongguan 523808,China

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaChinese Academy of SciencesChinese Academy of SciencesChinese Academy of SciencesChinese Academy of SciencesInnovation Program of Quantum Science and Technology

2022YFA120410062488201XDB33030000ZDBS-SSW-WHC001YSBR-003YSBR-0532021ZD0302700

2024

10.1088/1674-1056/ad4ffa

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(7)
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