Diverse electronic landscape of the kagome metal YbTi3Bi4

Abstract

Kagome lattices have emerged as an ideal platform for exploring exotic quantum phenomena in materials. Here, we report the discovery of Ti-based kagome metal YbTi3Bi4 which we characterize using angle-resolved photoemission spectroscopy (ARPES) and magneto-transport, in combination with density functional theory calculations. Our ARPES results reveal the complex fermiology of YbTi3Bi4 and provide spectroscopic evidence of four flat bands. Our measurements also show the presence of multiple van Hove singularities originating from Ti 3d orbitals and a linearly-dispersing gapped Dirac-like bulk state at the K point in accord with our theoretical calculations. Our study establishes YbTi3Bi4 as a platform for exploring exotic phases in the wider LnTi3Bi4 (Ln= lanthanide) family of materials.

16 pages, 14 figures

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Cited by in corpus (8)

• Spin density wave and van Hove singularity in the kagome metal CeTi3Bi4
• Kagome metals
• Spectroscopic origin of giant anomalous Hall effect in an interwoven magnetic kagome metal
• Observation of multiple flat bands and van Hove singularities in the distorted kagome metal NdTi3Bi4
• Observation of unexpected band splitting and magnetically-induced band structure reconstruction in TbTi${}_3$Bi${}_4$
• Diverse electronic topography in a distorted kagome metal LaTi3Bi4
• Synergistic doping and stabilization of magnetically tunable LnTi${}_3$(Sb,Sn)${}_4$ (Ln:Ce--Gd) kagome metals
• Revealing magnetism in the distorted kagome $R$Ti${}_3$Bi${}_4$ ($R$ = Nd, Sm, Gd) via ARPES and XMCD