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.
| Original language | English |
|---|---|
| Article number | 241 |
| Journal | Communications Materials |
| Volume | 5 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 2024 |
Funding
M.N. acknowledges support from the Air Force Office of Scientific Research MURI (Grant No. FA9550-20-1-0322) and the National Science Foundation (NSF) CAREER award DMR-1847962. Work performed by B.R.O. is sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the US Department of Energy. D.G.M. acknowledges the support from AFOSR MURI (Novel Light-Matter Interactions in Topologically Non-Trivial Weyl Semimetal Structures and Systems), Grant FA9550-20-1-0322. The work at Northeastern University was supported by the Air Force Office of Scientific Research under award number FA9550-20-1-0322 and benefited from the resources of Northeastern University\u2019s Advanced Scientific Computation Center, the Discovery Cluster, and the Massachusetts Technology Collaborative. This research used resources of the Advanced Light Source, a US Department of Energy Office of Science User Facility, under Contract No. DE-AC02-05CH11231. We thank Sung-Kwan Mo and Jonathan Denlinger for beamline assistance at the Advanced Light Source (ALS), Lawrence Berkeley National Laboratory. We thank Makoto Hashimoto and Donghui Lu for the beamline assistance at SSRL end station 5-2. The use of Stanford Synchrotron Radiation Lightsource (SSRL) in SLAC National Accelerator Laboratory is supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.