Diverse electronic landscape of the kagome metal YbTi3Bi4
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 $$\overline{\,{\mbox{K}}\,}$$ 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. Kagome lattices have emerged as an ideal platform for exploring exotic quantum phenomena in materials. Here, the discovery of a Ti-based kagome metal YbTi3Bi4 is reported, showing spectroscopic evidence of four flat bands originating from both Yb 4f and Ti 3d orbitals, multiple van Hove singularities, and a linearly dispersing gapped Dirac-like bulk state.
Authors
- Barun Ghosh (ORCID: https://orcid.org/0000-0001-6634-0508)
- Mazharul Islam Mondal (ORCID: https://orcid.org/0000-0003-1674-2845)
- Arun Bansil (ORCID: https://orcid.org/0000-0002-3864-3461)
- David Mandrus (ORCID: https://orcid.org/0000-0003-3616-7104)
- Anup Pradhan Sakhya (ORCID: https://orcid.org/0000-0003-1307-1732)
- Matthew Matzelle (ORCID: https://orcid.org/0000-0003-0197-255X)
- Milo Sprague (ORCID: https://orcid.org/0000-0003-2498-4342)
- Madhab Neupane (ORCID: https://orcid.org/0000-0002-8288-8474)
- Brenden R. Ortiz (ORCID: https://orcid.org/0000-0002-1333-7003)
- Nathan Valadez (ORCID: https://orcid.org/0009-0002-3452-3822)
- Iftakhar Bin Elius (ORCID: https://orcid.org/0000-0002-1056-3320)
Institutions
- University of Central Florida (US)
- Oak Ridge National Laboratory (US)
- Northeastern University (US)
- Knoxville College (US)
- University of Tennessee at Knoxville (US)
Publication Details
- Journal
- Communications Materials
- Published
- 2024-11-03
- DOI
- https://doi.org/10.1038/s43246-024-00681-3
- Citations
- 12
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 4.05
Funders
- National Science Foundation
- U.S. Department of Energy
- Battelle
- UT-Battelle
- Office of Science
- Multidisciplinary University Research Initiative
- Division of Materials Research
- Basic Energy Sciences
- Air Force Office of Scientific Research
- Oak Ridge National Laboratory
- Lawrence Berkeley National Laboratory
- SLAC National Accelerator Laboratory