Competition of superconductivity and charge density wave in selective oxidized CsV3Sb5 thin flakes

Abstract

The recently discovered layered kagome metals AV${}_3$Sb${}_5$ (A = K, Rb, and Cs) with vanadium kagome networks provide a novel platform to explore correlated quantum states intertwined with topological band structures. Here we report the prominent effect of hole doping on both superconductivity and charge density wave (CDW) order, achieved by selective oxidation of exfoliated thin flakes. A superconducting dome is revealed as a function of the effective doping content. The superconducting transition temperature ($T_{\mathrm{c}}$) and upper critical field in thin flakes are significantly enhanced compared with the bulk, which is accompanied by the suppression of CDW. Our detailed analyses establish the pivotal role of van Hove singularities (VHSs) in promoting correlated quantum orders in these kagome metals. Our experiment not only demonstrates the intriguing nature of superconducting and CDW orders, but also provides a novel route to tune the carrier concentration through both selective oxidation and electric gating. This establishes AV${}_3$Sb${}_5$ as a tunable 2D platform for the further exploration of topology and correlation among 3$d$ electrons in kagome lattices.

13 pages, 12 figures

References in corpus (24)

• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
• Discovery of unconventional chiral charge order in kagome superconductor KV3Sb5
• Discovery of a quantum limit Chern magnet TbMn6Sn6
• Unconventional Fermi surface instabilities in the Kagome Hubbard Model
• Superconductivity in the ${\mathbb{Z}}_2$ kagome metal KV${}_3$Sb${}_5$
• Double superconducting dome and triple enhancement of Tc in the kagome superconductor CsV3Sb5 under high pressure
• Concurrence of anomalous Hall effect and charge density wave in a superconducting topological kagome metal
• Three-dimensional charge density wave and robust zero-bias conductance peak inside the superconducting vortex core of a kagome superconductor CsV${}_3$Sb${}_5$
• Superconductivity and normal-state properties of kagome metal RbV3Sb5 single crystals
• Chiral flux phase in the Kagome superconductor AV${}_3$Sb${}_5$
• Nature of unconventional pairing in the kagome superconductors AV${}_3$Sb${}_5$
• Complex charge density waves at Van Hove singularity on hexagonal lattices: Haldane-model phase diagram and potential realization in kagome metals ${\text{AV}}_3{\text{Sb}}_5$
• Multiband superconductivity with sign-preserving order parameter in kagome superconductor CsV3Sb5
• Pressure-induced Reemergence of Superconductivity in Topological Kagome Metal CsV3Sb5
• Doped Kagome System as Exotic Superconductor
• s-wave superconductivity in kagome metal CsV${}_3$Sb${}_5$ revealed by ${}^{121/123}$Sb NQR and ${}^{51}$V NMR measurements
• Nodeless superconductivity in the kagome metal CsV${}_3$Sb${}_5$
• Highly-robust reentrant superconductivity in CsV3Sb5 under pressure
• Anisotropic superconducting properties of Kagome metal CsV3Sb5
• Charge-density-wave-induced bands renormalization and energy gaps in a kagome superconductor RbV3Sb5
• Competing orders at higher-order Van Hove points
• Kinetic ferromagnetism on a kagome lattice
• High-Tc superconductivity up to 55 K under high pressure in the heavily electron doped Lix(NH3)yFe2Se2 single crystal
• Charge density wave and superconductivity competition in Lu${}_5$Ir${}_4$Si${}_{10}$ : a proton irradiation study

Cited by in corpus (64)

• Topological kagome magnets and superconductors
• Rich Nature of Van Hove Singularities in Kagome Superconductor CsV${}_3$Sb${}_5$
• Quantum states and intertwining phases in kagome materials
• AV${}_3$Sb${}_5$ Kagome Superconductors: Progress and Future Directions
• Theory of the charge-density wave in $A$V${}_3$Sb${}_5$ kagome metals
• Fermi level tuning and double-dome superconductivity in the kagome metals CsV${}_3$Sb${}_{5-x}$Sn${}_x$
• A unique van Hove singularity in kagome superconductor CsV${}_{3-x}$Ta${}_x$Sb${}_5$ with enhanced superconductivity
• Charge density wave order in kagome metal AV${}_3$Sb${}_5$ (A= Cs, Rb, K)
• Coexistence of Multiple Stacking Charge Density Waves in Kagome Superconductor ${\mathrm{CsV}}_3{\mathrm{Sb}}_5$
• Competing superconductivity and charge-density wave in Kagome metal CsV3Sb5: evidence from their evolutions with sample thickness
• Large kagome family candidates with topological superconductivity and charge density waves
• Tunable van Hove singularity without structural instability in Kagome metal CsTi${}_3$Bi${}_5$
• Electrically controlled superconductor-insulator transition and giant anomalous Hall effect in kagome metal CsV3Sb5 nanoflakes
• Charge density wave order and fluctuations above T${}_{CDW}$ and below superconducting T${}_c$ in the kagome metal CsV${}_3$Sb${}_5$
• Crucial role of out-of-plane Sb-$p$ orbitals in Van Hove singularity formation and electronic correlation for superconducting Kagome metal CsV${}_3$Sb${}_5$
• Fermiology and Origin of Tc Enhancement in a Kagome Superconductor Cs(V1-xNbx)3Sb5
• Dynamical Study of the Origin of the Charge Density Wave in $A$V${}_3$Sb${}_5$ ($A=$K, Rb, Cs) Compounds
• Evolution of electronic structure in pristine and hole-doped kagome metal RbV${}_3$Sb${}_5$
• Spectroscopic Evidence for a Three-Dimensional Charge Density Wave in Kagome Superconductor CsV${}_3$Sb${}_5$
• Van Hove tuning of AV3Sb5 kagome metals under pressure and strain
• Emergence of large quantum oscillation frequencies in thin flakes of the kagome superconductor CsV${}_3$Sb${}_5$
• Multidome superconductivity in charge density wave kagome metals
• Electronic properties of correlated kagomé metals AV${}_3$Sb${}_5$(A = K, Rb, Cs): A perspective
• Monolayer Kagome Metals AV${}_3$Sb${}_5$
• Orbital hybridization-driven charge density wave transition in CsV3Sb5 kagome superconductor
• Dirac Nodal Lines and Nodal Loops in a Topological Kagome Superconductor CsV${}_3$Sb${}_5$
• Surface-termination-dependent electronic states in kagome superconductors AV3Sb5 (A = K, Rb, Cs) studied by micro-ARPES
• Distinct band reconstructions in kagome superconductor CsV${}_3$Sb${}_5$
• Anisotropic magnetism and band evolution induced by ferromagnetic phase transition in titanium-based kagome ferromagnet SmTi3Bi4
• Effects of Nb Doping on the Charge-Density Wave and Electronic Correlations in the Kagome Metal Cs(V${}_{1-x}$Nb${}_x$)${}_3$Sb${}_5$
• Evolution of Superatomic-Charge-density-wave and Superconductivity under Pressure in AuTe${}_2$Se${}_{4/3}$
• Electronic Correlations and Evolution of the Charge-Density Wave in the Kagome Metals $A$V${}_3$Sb${}_5$ ($A$ = K, Rb, Cs)
• Topological superconductivity and large spin Hall effect in the kagome family Ti6X4 (X = Bi, Sb, Pb, Tl, In)
• Pressure evolution of electron dynamics in the superconducting kagome metal CsV${}_3$Sb${}_5$
• Phenomenology of bond and flux orders in kagome metals
• Crossover between electron-electron and electron-phonon mediated pairing on the Kagome lattice
• Electronic structure and spin-lattice relaxation in superconducting vortex states on the kagome lattice near van Hove filling
• Emergence of Quantum Confinement in Topological Kagome Superconductor CsV${}_3$Sb${}_5$ family
• Impact of the orbital current order on the superconducting properties of the kagome superconductors
• Enhancement of the superconductivity and quantum metallic state in the thin film of superconducting Kagome metal KV${}_3$Sb${}_5$
• 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
• Two-dimensional phase diagram of the charge density wave in doped CsV${}_3$Sb${}_5$
• Dimensional crossover of charge order in IrTe${}_2$ with strong interlayer coupling
• Conventional Superconductivity in the Doped Kagome Superconductor Cs(V0.86Ta0.14)3Sb5 from Vortex Lattice Studies
• Charge density wave modulated third-order nonlinear Hall effect in 1$T$-VSe${}_2$ nanosheets
• Complete miscibility amongst AV${}_3$Sb${}_5$ kagome superconductors: design of mixed A-site AV${}_3$Sb${}_5$ (A: K, Rb, Cs) alloys
• Flat bands and distinct density wave orders in correlated Kagome superconductor CsCr${}_3$Sb${}_5$
• Engineering Phase Competition Between Stripe Order and Superconductivity in La${}_{1.88}$Sr${}_{0.12}$CuO${}_4$
• Effects of 3 MeV Proton Irradiation on Superconductivity and CDW in 2H-NbSe2 Single Crystals
• Quantum Phase Transition as a Promising Route to Enhance the Critical Current in Kagome Superconductor CsV${}_3$Sb${}_5$
• Topological Superconducting States and Quasiparticle Transport on Kagome Lattice
• Loop Current Order on the Kagome Lattice
• Surface region band enhancement in noble gas adsorption assisted ARPES on kagome superconductor RbV3Sb5
• Charge-density wave fluctuation driven composite order in the layered Kagome Metals
• Distinct pressure evolution of superconductivity and charge-density-wave in kagome superconductor CsV${}_3$Sb${}_5$ thin flakes
• Delicate Superconductivity in NaAlGe Single Crystal
• Two-dimensional superconductivity in a thick exfoliated kagome film
• Coexistence of charge density wave and field-tuned magnetic states in TmNiC${}_2$
• Resistive anisotropy in the charge density wave phase of Kagome superconductor CsV3Sb5 thin films
• The possible frustrated superconductivity in the kagome superconductors
• Tunable Competing Electronic Orders in Double Quantum Spin Hall Superlattices
• Current-induced magnetoresistance hysteresis in the kagome superconductor CsV${}_3$Sb${}_5$
• Effective Ionic Valence and Local Magnetic Moment in Kagome Superconductors