Geometry of the charge density wave in kagom$\acute{e}$ metal AV${}_3$Sb${}_5$

Abstract

Kagom$\acute{e}$ lattice is a fertile platform for topological and intertwined electronic excitations. Recently, experimental evidence of an unconventional charge density wave (CDW) is observed in a Z2 kagom$\acute{e}$ metal AV${}_3$Sb${}_5$ (A= K, Cs, Rb). This observation triggers wide interests on the interplay between frustrated crystal structure and Fermi surface instabilities. Here we analyze the lattice effect and its impact on CDW in AV${}_3$Sb${}_5$. Based on published experimental data, we show that the CDW induced structural distortions is consistent with the theoretically predicted inverse star-of-David pattern, which preserves the $D_{6h}$ symmetry in the kagom$\acute{e}$ plane but breaks the sixfold rotational symmetry of the crystal due to the phase shift between kagom$\acute{e}$ layers. The coupling between the lattice and electronic degrees of freedom yields a weak first order structural transition without continuous change of lattice dynamics. Our result emphasizes the fundamental role of lattice geometry in proper understanding of unconventional electronic orders in AV${}_3$Sb${}_5$.

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Cited by in corpus (43)

• Topological kagome magnets and superconductors
• Electronic Nature of Charge Density Wave and Electron-Phonon Coupling in Kagome Superconductor KV${}_3$Sb${}_5$
• Kagome superconductors AV${}_3$Sb${}_5$ (A=K, Rb, Cs)
• Three-state nematicity and magneto-optical Kerr effect in the charge density waves in kagome superconductors
• Quantum states and intertwining phases in kagome materials
• Chern Fermi pocket, topological pair density wave, and charge-4e and charge-6e superconductivity in kagome superconductors
• Electron-phonon coupling in the charge density wave state of CsV${}_3$Sb${}_5$
• Chiral kagome superconductivity modulations with residual Fermi arcs in KV3Sb5 and CsV3Sb5
• Chiral excitonic order from twofold van Hove singularities in kagome metals
• 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 ${\mathrm{CsV}}_3{\mathrm{Sb}}_5$
• Spin-phonon coupling driven Charge density wave in a Kagome Magnet
• No observation of chiral flux current in the topological kagome metal CsV${}_3$Sb${}_5$
• Revealing the immediate formation of two-fold rotation symmetry in charge-density-wave state of Kagome superconductor CsV${}_3$Sb${}_5$ by optical polarization rotation measurement
• Observation of electronic nematicity driven by three-dimensional charge density wave in kagome lattice KV${}_3$Sb${}_5$
• Testing Electron-phonon Coupling for the Superconductivity in Kagome Metal $\mathrm{Cs}{\mathrm{V}}_3\mathrm{S}{\mathrm{b}}_5$
• Order-disorder Peierls instability in the kagome metal (Cs,Rb)V${}_3$Sb${}_5$
• Theory of nematic charge orders in kagome metals
• The effect of the interlayer ordering on the Fermi surface of Kagome superconductor CsV${}_3$Sb${}_5$ revealed by quantum oscillations
• Dynamical Study of the Origin of the Charge Density Wave in $A$V${}_3$Sb${}_5$ ($A=$K, Rb, Cs) Compounds
• Spectroscopic Evidence for a Three-Dimensional Charge Density Wave in Kagome Superconductor CsV${}_3$Sb${}_5$
• Multidome superconductivity in charge density wave kagome metals
• Novel three-dimensional Fermi surface and electron-correlation-induced charge density wave in FeGe
• Electronic properties of correlated kagomé metals AV${}_3$Sb${}_5$(A = K, Rb, Cs): A perspective
• Structural instability and charge modulations in the Kagome superconductor $A$V${}_3$Sb${}_5$
• The structure of kagome superconductors CsV${}_3$Sb${}_5$ in the charge density wave states
• Tri-Hexagonal charge order in kagome metal CsV${}_3$Sb${}_5$ revealed by ${}^{121}$Sb NQR
• Triple-$\mathcal{Q}$ partial magnetic orders induced by quadrupolar interactions: Triforce order scenario for UNi${}_4$B
• Kagome metals
• Electronic band structures of topological kagome materials
• AV${}_3$Sb${}_5$ kagome superconductors: a review with transport measurements
• Two elementary band representation model, Fermi surface nesting, and surface topological superconductivity in $A$V${}_3$Sb${}_5$ ($A=\text{K, Rb, Cs}$)
• Non-degenerate surface pair density wave in the Kagome superconductor CsV${}_3$Sb${}_5$ -- application to vestigial orders
• Evidence for reduced periodic lattice distortion within the Sb-terminated surface layer of the kagome metal CsV${}_3$Sb${}_5$
• Coherent Phonon Pairs and Rotational Symmetry Breaking of Charge Density Wave Order in the Kagome Superconductor CsV${}_3$Sb${}_5$
• Topological Superconducting States and Quasiparticle Transport on Kagome Lattice
• Local pairing versus bulk superconductivity intertwined by the charge density wave order in Cs(V${}_{1-x}$Ta${}_x$)${}_3$Sb${}_5$
• Charge Density Waves in the 2.5-Dimensional Quantum Heterostructure
• Majorana Braiding Racetracks from Charge Chern Insulator - Superconductor Hybrids
• Persistence of charge density wave fluctuations in the absence of long-range order in a hole-doped kagome metal
• Hexagonal-to-base-centered-orthorhombic $4Q$ charge density wave order in kagome metals KV${}_3$Sb${}_5$, RbV${}_3$Sb${}_5$, and CsV${}_3$Sb${}_5$
• Effective Ionic Valence and Local Magnetic Moment in Kagome Superconductors
• Microscopic origin of period-four stripe charge-density-wave in kagome metal CsV${}_3$Sb${}_5$