Kagome surface states and weak electronic correlation in vanadium-kagome metals

Abstract

RV6Sn6 (R = Y and lanthanides) with two-dimensional vanadium-kagome surface states is an ideal platform to investigate kagome physics and manipulate the kagome features to realize novel phenomena. Utilizing the micron-scale spatially resolved angle-resolved photoemission spectroscopy and first-principles calculations, we report a systematical study of the electronic structures of RV6Sn6 (R = Gd, Tb, and Lu) on the two cleaved surfaces, i.e., the V- and RSn1-terminated (001) surfaces. The calculated bands without any renormalization match well with the main ARPES dispersive features, indicating the weak electronic correlation in this system. We observe 'W'-like kagome surface states around the Brillouin zone corners showing R-element-dependent intensities, which is probably due to various coupling strengths between V and RSn1 layers. Our finding suggests an avenue for tuning electronic states by interlayer coupling based on two-dimensional kagome lattices.

References in corpus (32)

• Maximally localized Wannier functions: Theory and applications
• WannierTools: An open-source software package for novel topological materials
• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• CsV${}_3$Sb${}_5$: a ${\mathbb{Z}}_2$ topological kagome metal with a superconducting ground state
• Massive Dirac fermions in a ferromagnetic kagome metal
• Magnetic Weyl Semimetal Phase in a Kagome Crystal
• Dirac fermions and flat bands in the ideal kagome metal FeSn
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Large intrinsic anomalous Hall effect in half-metallic ferromagnet Co3Sn2S2 with magnetic Weyl fermions
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• Discovery of a quantum limit Chern magnet TbMn6Sn6
• Negative flat band magnetism in a spin-orbit coupled correlated kagome magnet
• Topological flat bands in frustrated kagome lattice CoSn
• Giant and anisotropic many-body spin-orbit tunability in a strongly correlated kagome magnet
• Orbital-selective Dirac fermions and extremely flat bands in frustrated kagome-lattice metal CoSn
• Charge density wave in kagome lattice intermetallic ScV6Sn6
• Rare earth engineering in RMn${}_6$Sn${}_6$ topological kagome magnets
• Emergence of new van Hove singularities in the charge density wave state of a topological kagome metal RbV3Sb5
• Realizing Kagome Band Structure in Two-Dimensional Kagome Surface States of $R{V}_{6}S{n}_6$ ($R$=Gd,Ho)
• Charge-density-wave-induced bands renormalization and energy gaps in a kagome superconductor RbV3Sb5
• Dirac Fermions in Antiferromagnetic FeSn Kagome Lattices with Combined Space Inversion and Time Reversal Symmetry
• Tunable Topological Dirac Surface States and Van Hove Singularities in Kagome Metal GdV${}_6$Sn${}_6$
• Anomalous Hall Effect in Kagome Ferrimagnet GdMn${}_6$Sn${}_6$
• Unconventional superconducting gap in NaFe${}_{0.95}$Co${}_{0.05}$As observed by angle-resolved photoemission spectroscopy
• Uniaxial ferromagnetism in the kagome metal TbV${}_6$Sn${}_6$
• Optical spectroscopy and band structure calculations of structural phase transition in the Vanadium-based kagome metal ScV${}_6$Sn${}_6$
• Flat band separation and robust spin-Berry curvature in bilayer kagome metals
• Anisotropic magnetic property of single crystals $R$V${}_6$Sn${}_6$ ($R$ = Y, Gd - Tm, Lu)
• Highly anisotropic magnetism in the vanadium-based kagome metal TbV6Sn6
• Robust Kagome Electronic Structure in Topological Quantum Magnets XMn6Sn6 (X = Dy, Tb, Gd, Y)

Cited by in corpus (1)

• Competing Lattice Instability and Magnetism on the Surface of Kagome Metals