Chiral Pair Density Waves with Residual Fermi Arcs in RbV_(3)Sb_(5)  

作　　者：Xiao-Yu Yan Hanbin Deng Tianyu Yang Guowei Liu Wei Song Hu Miao Zhijun Tu Hechang Lei Shuo Wang Ben-Chuan Lin Hailang Qin Jia-Xin Yin 

机构地区：[1]Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China [2]Materials Science and Technology Division,Oak Ridge National Laboratory,Oak Ridge,Tennessee 37831,USA [3]Beijing Key Laboratory of Optoelectronic Functional Materials MicroNano Devices,Department of Physics,Renmin University of China,Beijing 100872,China [4]Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education),Renmin University of China,Beijing 100872,China [5]Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China [6]Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China [7]Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area,Shenzhen 518055,China

出　　处：《Chinese Physics Letters》2024年第9期88-92,共5页中国物理快报（英文版）

基　　金：supported by the National Key R&D Program of China(Grant Nos.2023YFA1407300,2023YFA1406500,2022YFA1403800,and 2023YFF0718403);the National Natural Science Foundation of China(Grant Nos.12374060,12274459,and 12074162);Guangdong Provincial Quantum Science Strategic Initiative(Grant No.GDZX2201001);the Beijing Natural Science Foundation(Grant No.Z200005);Guangdong Basic and Applied Basic Research Foundation(Grant No.2022B1515130005)。

摘　　要：The chiral 2×2 charge order has been reported and confirmed in the kagome superconductor RbV_(3)Sb_(5),while its interplay with superconductivity remains elusive owing to its lowest superconducting transition temperature Tc of about 0.85K in the AV_(3)Sb_(5) family(A=K,Rb,Cs)that severely challenges electronic spectroscopic probes.Here,utilizing dilution-refrigerator-based scanning tunneling microscopy down to 30 mK,we observe chiral 2×2 pair density waves with residual Fermi arcs in RbV_(3)Sb_(5).We find a superconducting gap of 150 μeV with substantial residual in-gap states.The spatial distribution of this gap exhibits chiral 2×2 modulations,signaling a chiral pair density wave(PDW).Our quasi-particle interference imaging of the zero-energy residual states further reveals arc-like patterns.We discuss the relation of the gap modulations with the residual Fermi arcs under the space-momentum correspondence between PDW and Bogoliubov Fermi states.

关 键 词：FERMI CHIRAL utilizing 

分 类 号：O469[理学—凝聚态物理]