Chiral Pair Density Waves with Residual Fermi Arcs in RbV3Sb5

Xiao-Yu Yan ¹Hanbin Deng ¹Tianyu Yang ¹Guowei Liu ¹Wei Song ¹Hu Miao ²Zhijun Tu ³Hechang Lei ³Shuo Wang ⁴Ben-Chuan Lin ⁴Hailang Qin ⁵Jia-Xin Yin⁶

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作者信息

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;Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education),Renmin University of China,Beijing 100872,China
4. Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China;Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China
5. Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area,Shenzhen 518055,China
6. Department of Physics,Southern University of Science and Technology,Shenzhen 518055,China;Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area,Shenzhen 518055,China
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Abstract

The chiral 2×2 charge order has been reported and confirmed in the kagome superconductor RbV3Sb5,while its interplay with superconductivity remains elusive owing to its lowest superconducting transition temperature Tc of about 0.85 K in the AV3Sb5 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 RbV3Sb5.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.

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基金项目

National Key R&D Program of China(2023YFA1407300)

National Key R&D Program of China(2023YFA1406500)

National Key R&D Program of China(2022YFA1403800)

National Key R&D Program of China(2023YFF0718403)

National Natural Science Foundation of China(12374060)

National Natural Science Foundation of China(12274459)

National Natural Science Foundation of China(12074162)

Guangdong Provincial Quantum Science Strategic Initiative(GDZX2201001)

Beijing Natural science Foundation(Z200005)

Guangdong Basic and Applied Basic Research Foundation(2022B1515130005)

出版年

2024

中国物理快报(英文版)

中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDCSCDEI

影响因子：0.515

ISSN：0256-307X

参考文献量33

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