Van Hove tuning of AV3Sb5 kagome metals under pressure and strain

Abstract

From first-principles calculations, we investigate the structural and electronic properties of the kagome metals AV3Sb5 (A = Cs, K, Rb) under isotropic and anisotropic pressure. Charge ordering patterns are found to be unanimously suppressed, while there is a significant rearrangement of p-type and m-type van Hove point energies with respect to the Fermi level. Already for moderate tensile strain along the V plane and compressive strain normal to the V layer, we find that a van Hove point can be shifted to the Fermi energy. Such a mechanism provides an invaluable tuning knob to alter the correlation profile in the kagome metal, and suggests itself for further experimental investigation. It might allow to reconcile possible multi-dome superconductivity in kagome metals not only from phonons, but also from the viewpoint of unconventional pairing.

7 pages, 5 figures

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Cited by in corpus (23)

• Quantum states and intertwining phases in kagome materials
• Chiral excitonic order from twofold van Hove singularities in kagome metals
• Flat band separation and robust spin-Berry curvature in bilayer kagome metals
• Theory of nematic charge orders in kagome metals
• Microscopic nature of the charge-density wave in kagome superconductor RbV${}_3$Sb${}_5$
• Dynamics and Resilience of the Charge Density Wave in a bilayer kagome metal
• Impact of Sb degrees of freedom on the charge density wave phase diagram of the kagome metal CsV${}_3$Sb${}_5$
• Superconductivity from Orbital-Selective Electron-Phonon Coupling in $A{\mathrm{V}}_3{\mathrm{Sb}}_5$
• The kagome Hubbard model from a functional renormalization group perspective
• Effect of nonhydrostatic pressure on the superconducting kagome metal CsV${}_3$Sb${}_5$
• Tilted Dirac cones and topological transitions in strained kagome lattices
• Kagome metals
• A practical method to detect, analyse and engineer higher order Van Hove singularities in multi-band Hamiltonians
• Uniaxial strain tuning of charge modulation and singularity in a kagome superconductor
• Enhanced nematicity emerging from higher-order van Hove singularities
• Kagome materials $A$V${}_3$Sb${}_5$ ($A$=K,Rb,Cs): pairing symmetry and pressure-tuning studies
• Inversion and Tunability of Van Hove Singularities in $A$V${}_3$Sb${}_5$ ($A$ = K, Rb, and Cs) kagome metals
• Designing Topological High-Order Van Hove Singularities: Twisted Bilayer Kagomé
• Nanoscale strain manipulation of smectic susceptibility in kagome superconductors
• Nonequilibrium control of kagome metals
• Correlation-driven non-trivial phases in single bi-layer Kagome intermetallics
• Van-Hove tuning of Fermi surface instabilities through compensated metallicity
• Theory of unconventional magnetism in a Cu-based kagome metal