Nodeless superconductivity in the kagome metal CsV${}_3$Sb${}_5$

Abstract

The recently discovered kagome metal series $A$V${}_3$Sb${}_5$ ($A$=K, Rb, Cs) exhibits topologically nontrivial band structures, chiral charge order and superconductivity, presenting a unique platform for realizing exotic electronic states. The nature of the superconducting state and the corresponding pairing symmetry are key questions that demand experimental clarification. Here, using a technique based on the tunneling diode oscillator, the magnetic penetration depth $\Delta \lambda (T)$ of CsV${}_3$Sb${}_5$ was measured down to 0.07 K. A clear exponential behavior in $\Delta \lambda (T)$ with marked deviations from a $T$ or $T^2$ temperature dependence is observed at low temperatures, indicating a deficiency of nodal quasiparticles. Temperature dependence of the superfluid density and electronic specific heat can be described by two-gap $s$-wave superconductivity, consistent with the presence of multiple Fermi surfaces in CsV${}_3$Sb${}_5$. These results evidence nodeless superconductivity in CsV${}_3$Sb${}_5$ under ambient pressure, and constrain the allowed pairing symmetry.

References in corpus (15)

• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
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• Spin waves in the Frustrated Kagome Lattice Antiferromagnet KFe3(OH)6(SO4)2
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Cited by in corpus (100)

• Topological kagome magnets and superconductors
• Nature of unconventional pairing in the kagome superconductors AV${}_3$Sb${}_5$
• Electronic Nature of Charge Density Wave and Electron-Phonon Coupling in Kagome Superconductor KV${}_3$Sb${}_5$
• Rich Nature of Van Hove Singularities in Kagome Superconductor CsV${}_3$Sb${}_5$
• Fermi surface mapping and the nature of charge density wave order in the kagome superconductor CsV${}_3$Sb${}_5$
• Kagome superconductors AV${}_3$Sb${}_5$ (A=K, Rb, Cs)
• Multiband superconductivity with sign-preserving order parameter in kagome superconductor CsV3Sb5
• Twofold symmetry of $c$-axis resistivity in topological kagome superconductor CsV${}_3$Sb${}_5$ with in-plane rotating magnetic field
• Quantum states and intertwining phases in kagome materials
• AV${}_3$Sb${}_5$ Kagome Superconductors: Progress and Future Directions
• Tunable nodal kagome superconductivity in charge ordered RbV3Sb5
• Multiple Energy Scales and Anisotropic Energy Gap in the Charge-Density-Wave Phase of Kagome Superconductor CsV3Sb5
• Nodeless electron pairing in CsV${}_3$Sb${}_5$-derived kagome superconductors
• Mechanism of exotic density-wave and beyond-Migdal unconventional superconductivity in kagome metal AV3Sb5 (A=K, Rb, Cs)
• Quantum transport evidence of topological band structures of kagome superconductor CsV3Sb5
• Competition of superconductivity and charge density wave in selective oxidized CsV3Sb5 thin flakes
• Microscopic evidence for anisotropic multigap superconductivity in the CsV${}_3$Sb${}_5$ kagome superconductor
• Superconducting diode effect and interference patterns in Kagome CsV3Sb5
• Superconductivity emerging from density-wave-like order in a correlated kagome metal
• Charge-Density-Wave-Induced Peak-Dip-Hump Structure and the Multiband Superconductivity in a Kagome Superconductor CsV${}_3$Sb${}_5$
• Loop currents in $A$V${}_3$Sb${}_5$ kagome metals: multipolar and toroidal magnetic orders
• Revealing the competition between charge-density wave and superconductivity in CsV${}_3$Sb${}_5$ through uniaxial strain
• Double-dome superconductivity under pressure in the V-based Kagome metals AV3Sb5 (A = Rb and K)
• Bulk evidence of anisotropic $s$-wave pairing with no sign change in the kagome superconductor CsV${}_3$Sb${}_5$
• Chiral excitonic order from twofold van Hove singularities in kagome metals
• Tuning the competition between superconductivity and charge order in kagome superconductor Cs(V1-xNbx)3Sb5
• No observation of chiral flux current in the topological kagome metal CsV${}_3$Sb${}_5$
• Tuning the van Hove singularities in AV${}_3$Sb${}_5$ (A = K, Rb, Cs) via pressure and doping
• Competing superconductivity and charge-density wave in Kagome metal CsV3Sb5: evidence from their evolutions with sample thickness
• Nodeless superconductivity in kagome metal CsV${}_3$Sb${}_5$ with and without time reversal symmetry breaking
• Superconductivity from repulsive interactions on the kagome lattice
• Anomalous thermal Hall effect and anomalous Nernst effect of CsV${}_3$Sb${}_5$
• Charge-4e and charge-6e flux quantization and higher charge superconductivity in kagome superconductor ring devices
• Strain-sensitive superconductivity in kagome metals KV${}_3$Sb${}_5$ and CsV${}_3$Sb${}_5$ probed by point-contact spectroscopy
• Interplay between Pair Density Wave and a Nested Fermi Surface
• First-principles study on the double-dome superconductivities in kagome material CsV${}_3$Sb${}_5$ under pressure
• Crucial role of out-of-plane Sb-$p$ orbitals in Van Hove singularity formation and electronic correlation for superconducting Kagome metal CsV${}_3$Sb${}_5$
• Emergent nematicity and intrinsic vs. extrinsic electronic scattering processes in the kagome metal CsV${}_3$Sb${}_5$
• Gapless excitations inside the fully gapped kagome superconductors AV${}_3$Sb${}_5$
• High-throughput Investigations of Topological and Nodal Superconductors
• Multidome superconductivity in charge density wave kagome metals
• Muon-spin relaxation study of the layered kagome superconductor CsV${}_3$Sb${}_5$
• Unconventional superconductivity protected from disorder on the kagome lattice
• Electronic properties of correlated kagomé metals AV${}_3$Sb${}_5$(A = K, Rb, Cs): A perspective
• Superconducting pairing symmetry in the kagome-lattice Hubbard model
• Electronic Landscape of Kagome Superconductors $\text{A}$V${}_3$Sb${}_5$ ($\text{A}$ = K, Rb, Cs) from Angle-Resolved Photoemission Spectroscopy
• Monolayer Kagome Metals AV${}_3$Sb${}_5$
• Altermagnetic Ground State in Distorted Kagome Metal CsCr${}_3$Sb${}_5$
• Superconductivity modulated by structural phase transitions in pressurized vanadium-based kagome metals
• Evolution of superconductivity and charge order in pressurized RbV${}_3$Sb${}_5$
• Superconductivity from Orbital-Selective Electron-Phonon Coupling in $A{\mathrm{V}}_3{\mathrm{Sb}}_5$
• Distinct band reconstructions in kagome superconductor CsV${}_3$Sb${}_5$
• Unconventional gapping behavior in a kagome superconductor
• Emergent superconducting fluctuations in a compressed kagome superconductor
• Strong-coupling superconductivity and weak vortex pinning in Ta-doped CsV${}_3$Sb${}_5$ single crystals
• Diagnosis of pairing symmetry by vortex and edge spectra in kagome superconductors
• Tri-Hexagonal charge order in kagome metal CsV${}_3$Sb${}_5$ revealed by ${}^{121}$Sb NQR
• FeGe as a building block for the kagome 1:1, 1:6:6, and 1:3:5 families: hidden d-orbital decoupling of flat band sectors, effective models and interaction Hamiltonians
• Kagome metals
• Kagome Materials I: SG 191, ScV${}_6$Sn${}_6$. Flat Phonon Soft Modes and Unconventional CDW Formation: Microscopic and Effective Theory
• Chiral-Flux-Phase-Based Topological Superconductivity in Kagome Systems with Mixed Edge Chiralities
• Crossover between electron-electron and electron-phonon mediated pairing on the Kagome lattice
• Similarities and Differences in the Fermiology of Kagome Metals AV${}_3$Sb${}_5$ (A=K, Rb, Cs) Revealed by Shubnikov-de Haas Oscillations
• Violation of Emergent Rotational Symmetry in the Hexagonal Kagome Superconductor CsV3Sb5
• Existence of Hebel-Slichter peak in unconventional kagome superconductors
• Electronic structure and spin-lattice relaxation in superconducting vortex states on the kagome lattice near van Hove filling
• Impact of the orbital current order on the superconducting properties of the kagome superconductors
• AV${}_3$Sb${}_5$ kagome superconductors: a review with transport measurements
• Non-degenerate surface pair density wave in the Kagome superconductor CsV${}_3$Sb${}_5$ -- application to vestigial orders
• Superconductivity and a van Hove singularity confined to the surface of a topological semimetal
• Interplay between Chiral Charge Density Wave and Superconductivity in Kagome Superconductors: A Self-consistent Theoretical Analysis
• Kagome materials $A$V${}_3$Sb${}_5$ ($A$=K,Rb,Cs): pairing symmetry and pressure-tuning studies
• Understanding resistance oscillation in CsV${}_3$Sb${}_5$ superconductor
• Conventional Superconductivity in the Doped Kagome Superconductor Cs(V0.86Ta0.14)3Sb5 from Vortex Lattice Studies
• Observation of Anomalous Thermal Hall Effect in a Kagome Superconductor
• Probing the pairing symmetry in kagome superconductors based on the single-particle spectrum
• Tuning electronic pairing by uniaxial strain in kagome lattices
• Observation of Fermi-surface-dependent anisotropic Cooper pairing in kagome superconductor CsV3Sb5
• Fully-gapped superconductivity with rotational symmetry breaking in pressurized kagome metal CsV${}_3$Sb${}_5$
• Quantum Phase Transition as a Promising Route to Enhance the Critical Current in Kagome Superconductor CsV${}_3$Sb${}_5$
• Interplay of superconductivity and charge-density-wave order in kagome materials
• Thermomodulated intrinsic Josephson effect in Kagome CsV3Sb5
• Topological Superconducting States and Quasiparticle Transport on Kagome Lattice
• Photoemission Insights to Electronic Orders in Kagome Superconductor AV3Sb5
• Large Oscillatory Thermal Hall Effect in Kagome Metals
• Charge-density wave fluctuation driven composite order in the layered Kagome Metals
• Impact of charge-density-wave pattern on the superconducting gap in V-based kagome superconductors
• van Hove Singularity-Driven Emergence of Multiple Flat Bands in Kagome Superconductors
• Impact of Charge Density Waves on Superconductivity and Topological Properties in AV${}_3$Sb${}_5$ Kagome Superconductors
• Local pairing versus bulk superconductivity intertwined by the charge density wave order in Cs(V${}_{1-x}$Ta${}_x$)${}_3$Sb${}_5$
• Magnetoresistance hysteresis in the superconduting state of Kagome CsV${}_3$Sb${}_5$
• Two-dimensional superconductivity in a thick exfoliated kagome film
• Vortex phase diagram of kagome superconductor CsV${}_3$Sb${}_5$
• Calculated Unconventional Superconductivity via Charge Fluctuations in Kagome Metal CsV3Sb5
• The possible frustrated superconductivity in the kagome superconductors
• Majorana edge states in s-wave kagome superconductors with Rashba interaction
• Strain-Tuned Nodal Superconductivity in the Charge-Ordered Kagome Metal CsV${}_3$Sb${}_5$
• Electron-electron and electron-phonon collision cross sections in CsV3Sb5
• Effective Ionic Valence and Local Magnetic Moment in Kagome Superconductors
• Enhanced Coupling of Superconductivity and Evolution of Gap Structure in CsV3Sb5 through Ta Doping