Orbital hybridization-driven charge density wave transition in CsV3Sb5 kagome superconductor

Abstract

Owing to its inherent non-trivial geometry, the unique structural motif of the recently discovered Kagome topological superconductor AV3Sb5 is an ideal host of diverse topologically non-trivial phenomena, including giant anomalous Hall conductivity, topological charge order, charge density wave, and unconventional superconductivity. Despite possessing a normal-state CDW order in the form of topological chiral charge order and diverse superconducting gaps structures, it remains unclear how fundamental atomic-level properties and many-body effects including Fermi surface nesting, electron-phonon coupling, and orbital hybridization contribute to these symmetry-breaking phenomena. Here, we report the direct participation of the V3d-Sb5p orbital hybridization in mediating the CDW phase transition in CsV3Sb5. The combination of temperature-dependent X-ray absorption and first principles studies clearly indicate the Inverse Star of David structure as the preferred reconstruction in the low-temperature CDW phase. Our results highlight the critical role that Sb orbitals plays and establish orbital hybridization as the direct mediator of the CDW states and structural transition dynamics in Kagome unconventional superconductors. This is a significant step towards the fundamental understanding and control of the emerging correlated phases from the Kagome lattice through the orbital interactions and provide promising approaches to novel regimes in unconventional orders and topology.

References in corpus (27)

• VASPKIT: A User-friendly Interface Facilitating High-throughput Computing and Analysis Using VASP Code
• Quantum Spin Liquid States
• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• 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
• Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
• Cascade of correlated electron states in a kagome superconductor CsV3Sb5
• Charge density waves and electronic properties of superconducting kagome metals
• Lattice symmetry breaking in cuprate superconductors: Stripes, nematics, and superconductivity
• Double superconducting dome and triple enhancement of Tc in the kagome superconductor CsV3Sb5 under high pressure
• Band-selective Measurement of Electronic Dynamics in VO2 using Femtosecond Near Edge X-ray Absorption
• Electronic Nature of Charge Density Wave and Electron-Phonon Coupling in Kagome Superconductor KV${}_3$Sb${}_5$
• The Ginzburg-Landau Theory of Type II superconductors in magnetic field
• Ultrafast melting of a charge-density wave in the Mott insulator 1T-TaS2
• Coherent phonon spectroscopy and interlayer modulation of charge density wave order in the kagome metal CsV${}_3$Sb${}_5$
• Probing topological quantum matter with scanning tunnelling microscopy
• Quantum transport evidence of topological band structures of kagome superconductor CsV3Sb5
• Competition of superconductivity and charge density wave in selective oxidized CsV3Sb5 thin flakes
• Orbital- and $k_z$-selective hybridisation of Se 4p and Ti 3d states in the charge density wave phase of TiSe${}_2$
• Thickness dependent properties in oxide heterostructures driven by structurally induced metal-oxygen hybridization variations
• Discovery of Superconductivity in (Ba,K)SbO${}_3$
• Tuning the van Hove singularities in AV${}_3$Sb${}_5$ (A = K, Rb, Cs) via pressure and doping
• Role of Sb in the superconducting kagome metal CsV${}_3$Sb${}_5$ revealed by its anisotropic compression
• Crucial role of out-of-plane Sb-$p$ orbitals in Van Hove singularity formation and electronic correlation for superconducting Kagome metal CsV${}_3$Sb${}_5$
• Orbital engineering in nickelate heterostructures driven by anisotropic oxygen hybridization rather than orbital energy levels
• Stabilization of three-dimensional charge order through interplanar orbital hybridization in Pr${}_x$Y${}_{1-x}$Ba${}_2$Cu${}_3$O${}_{6+\delta }$

Cited by in corpus (13)

• Theory of nematic charge orders in kagome metals
• Evidence chain for time-reversal symmetry-breaking kagome superconductivity
• Impact of Sb degrees of freedom on the charge density wave phase diagram of the kagome metal CsV${}_3$Sb${}_5$
• Kagome metals
• Self-passivated freestanding superconducting oxide film for flexible electronics
• Two elementary band representation model, Fermi surface nesting, and surface topological superconductivity in $A$V${}_3$Sb${}_5$ ($A=\text{K, Rb, Cs}$)
• Effect of Point Defects and Lattice Distortions on the Structural, Electronic, and Magnetic properties of Co${}_2$MnAl Heusler alloy
• Orbital-selective charge-density wave in TaTe${}_4$
• Quantum Phase Transition as a Promising Route to Enhance the Critical Current in Kagome Superconductor CsV${}_3$Sb${}_5$
• Impact of Charge Density Waves on Superconductivity and Topological Properties in AV${}_3$Sb${}_5$ Kagome Superconductors
• Small polarons mediated near-room-temperature metal-insulator transition in vanadium dioxide and their hopping dynamics
• Frustrated phonon with charge density wave in vanadium Kagome metal
• Superconducting critical temperature and dimensionality tuning of RbV${}_3$Sb${}_5$ via biaxial strain