Chiral Pair Density Waves with Residual Fermi Arcs in RbV3Sb5

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

doi:10.1088/0256-307X/41/9/097401

Chiral Pair Density Waves with Residual Fermi Arcs in RbV₃Sb₅

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

Quantum Heterostructures

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

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 T_C 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.

Original language	English
Article number	097401
Journal	Chinese Physics Letters
Volume	41
Issue number	9
DOIs	https://doi.org/10.1088/0256-307X/41/9/097401
State	Published - Aug 1 2024

Funding

This work was 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) and Guangdong Basic and Applied Basic Research Foundation (Grant No. 2022B1515130005).

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title = "Chiral Pair Density Waves with Residual Fermi Arcs in RbV3Sb5",

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.",

author = "Yan, {Xiao Yu} and Hanbin Deng and Tianyu Yang and Guowei Liu and Wei Song and Hu Miao and Zhijun Tu and Hechang Lei and Shuo Wang and Lin, {Ben Chuan} and Hailang Qin and Yin, {Jia Xin}",

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T1 - Chiral Pair Density Waves with Residual Fermi Arcs in RbV3Sb5

AU - Yan, Xiao Yu

AU - Deng, Hanbin

AU - Yang, Tianyu

AU - Liu, Guowei

AU - Song, Wei

AU - Miao, Hu

AU - Tu, Zhijun

AU - Lei, Hechang

AU - Wang, Shuo

AU - Lin, Ben Chuan

AU - Qin, Hailang

AU - Yin, Jia Xin

PY - 2024/8/1

Y1 - 2024/8/1

N2 - 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.

AB - 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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JO - Chinese Physics Letters

JF - Chinese Physics Letters

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Chiral Pair Density Waves with Residual Fermi Arcs in RbV₃Sb₅

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