Chiral pair density waves with residual Fermi arcs in RbV3Sb5

Abstract

The chiral 2 by 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 0.85K among the AV3Sb5 family (A=K, Rb, Cs) that severely challenges electronic spectroscopic probes. Here, utilizing dilution-refrigerator-based scanning tunneling microscopy (STM) down to 30mK, we observe chiral 2 by 2 pair density waves with residual Fermi arcs in RbV3Sb5. We find a superconducting gap of 150μeV with substantial residual in-gap states. The spatial distribution of this gap exhibits chiral 2 by 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.

To appear in Chinese Physics Letters

References in corpus (27)

• Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
• Cascade of correlated electron states in a kagome superconductor CsV3Sb5
• The Physics of Pair Density Waves
• Superconductivity and normal-state properties of kagome metal RbV3Sb5 single crystals
• Detection of a Cooper-Pair Density Wave in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$
• Observation of Unconventional Charge Density Wave without Acoustic Phonon Anomaly in Kagome Superconductors AV3Sb5 (A=Rb,Cs)
• Chiral flux phase in the Kagome superconductor AV${}_3$Sb${}_5$
• Analysis of Charge Order in the Kagome Metal $A$V${}_3$Sb${}_5$ ($A=$K,Rb,Cs)
• Electronic instabilities of kagome metals: saddle points and Landau theory
• Complex charge density waves at Van Hove singularity on hexagonal lattices: Haldane-model phase diagram and potential realization in kagome metals ${\text{AV}}_3{\text{Sb}}_5$
• Intrinsic nature of chiral charge order in the kagome superconductor RbV3Sb5
• AV${}_3$Sb${}_5$ Kagome Superconductors: Progress and Future Directions
• Tunable nodal kagome superconductivity in charge ordered RbV3Sb5
• Discovery of a Cooper-Pair Density Wave State in a Transition-Metal Dichalcogenide
• Visualizing the Energy-gap Modulations of the Cuprate Pair Density Wave State
• Detection of a Pair Density Wave State in UTe${}_2$
• Charge-density-wave-induced bands renormalization and energy gaps in a kagome superconductor RbV3Sb5
• Superconducting diode effect and interference patterns in Kagome CsV3Sb5
• Competition between charge-density-wave and superconductivity in the kagome metal RbV3Sb5
• Momentum Resolved Superconducting Energy Gaps of Sr${}_2$RuO${}_4$ from Quasiparticle Interference Imaging
• Chiral kagome superconductivity modulations with residual Fermi arcs in KV3Sb5 and CsV3Sb5
• Observation of electronic nematicity driven by three-dimensional charge density wave in kagome lattice KV${}_3$Sb${}_5$
• Charge-4e and charge-6e flux quantization and higher charge superconductivity in kagome superconductor ring devices
• Interplay between Pair Density Wave and a Nested Fermi Surface
• Evolution of electronic structure in pristine and hole-doped kagome metal RbV${}_3$Sb${}_5$
• Evolution of superconductivity and charge order in pressurized RbV${}_3$Sb${}_5$
• Chiral pair density wave as a precursor of the pseudogap in kagomé superconductors

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• Many-body electronic structure in pyrochlore superconductor CsBi2 and spin liquid Pr2Ir2O7
• Topological pair density waves in kagome superconductors
• Probing Quantum Geometric Phases via Scanning Tunneling Microscopy
• Josephson spectroscopy study of kagome superconductors toward the deep point-contact regime