Discovery and construction of surface kagome electronic states induced by p-d electronic hybridization

Abstract

Kagome-lattice materials possess attractive properties for quantum computing applications, but their synthesis remains challenging. Herein, we show surface kagome electronic states (SKESs) on a Sn-terminated triangular Co3Sn2S2 surface, which are imprinted by vertical p-d electronic hybridization between the surface Sn (subsurface S) atoms and the buried Co kagome lattice network in the Co3Sn layer under the surface. Owing to the subsequent lateral hybridization of the Sn and S atoms in a corner-sharing manner, the kagome symmetry and topological electronic properties of the Co3Sn layer is proximate to the Sn surface. The SKESs and both hybridizations were verified via qPlus non-contact atomic force microscopy (nc-AFM) and density functional theory calculations. The construction of SKESs with tunable properties can be achieved by the atomic substitution of surface Sn (subsurface S) with other group III-V elements (Se or Te), which was demonstrated theoretically. This work exhibits the powerful capacity of nc-AFM in characterizing localized topological states and reveals the strategy for synthesis of large-area transition-metal-based kagome lattice materials using conventional surface deposition techniques.

References in corpus (25)

• Van der Waals density functionals applied to solids
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Massive Dirac fermions in a ferromagnetic kagome metal
• Magnetic Weyl Semimetal Phase in a Kagome Crystal
• An sp-hybridized molecular carbon allotrope, cyclo[18]carbon
• 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
• Roton pair density wave and unconventional strong-coupling superconductivity in a topological kagome metal
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• Topological insulator on the kagome lattice
• Cascade of correlated electron states in a kagome superconductor CsV3Sb5
• Discovery of a quantum limit Chern magnet TbMn6Sn6
• Negative flat band magnetism in a spin-orbit coupled correlated kagome magnet
• Superlubricity of Graphene Nanoribbons on Gold Surfaces
• Band touching from real space topology in frustrated hopping models
• Theoretical prediction of a strongly correlated Dirac metal
• Three-dimensional Topological Insulators on the Pyrochlore Lattice
• Realizing Kagome Band Structure in Two-Dimensional Kagome Surface States of $R{V}_{6}S{n}_6$ ($R$=Gd,Ho)
• Localized spin-orbit polaron in magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• Abundant lattice instability in kagome metal ScV${}_6$Sn${}_6$
• Signatures for half-metallicity and nontrivial surface states in a Kagome-lattice magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• Spin-orbit quantum impurity and quantization in a topological magnet
• Nanoscale visualization and spectral fingerprints of the charge order in ScV6Sn6 distinct from other kagome metals
• Observation of linearly dispersive edge modes in a magnetic Weyl semimetal Co3Sn2S2

Cited by in corpus (3)

• Two-dimensional Kagome Materials: Theoretical Insights, Experimental Realizations, and Electronic Structures
• Perspective: imaging atomic step geometry to determine surface terminations of kagome materials and beyond
• High-Throughput Discovery of Kagome Materials in Transition Metal Oxide Monolayers