Observation of multiple flat bands and van Hove singularities in the distorted kagome metal NdTi3Bi4
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866915686984450048 |
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| author | Mondal, Mazharul Islam Sakhya, Anup Pradhan Sprague, Milo Ortiz, Brenden R. Matzelle, Matthew Kumay, Arun K Seal, Avike Ghosh, Barun Bansil, Arun Neupane, Madhab |
| author_facet | Mondal, Mazharul Islam Sakhya, Anup Pradhan Sprague, Milo Ortiz, Brenden R. Matzelle, Matthew Kumay, Arun K Seal, Avike Ghosh, Barun Bansil, Arun Neupane, Madhab |
| contents | Kagome materials have attracted enormous research interest recently owing to their diverse topological phases and manifestation of electronic correlation. Here, we present the electronic structure of a distorted ferromagnetic kagome metal, NdTi3Bi4, exhibiting a transition temperature of 9 K. Our investigation employs a combination of angle-resolved photoemission spectroscopy (ARPES) measurements and density functional theory (DFT) calculations. We discover the presence of two flat bands which are found to originate from the kagome structure formed by Ti atoms with major contribution from Ti dxy and Ti dx2-y2 orbitals. We also observed multiple van Hove singularities (VHSs) in its electronic structure, with one VHS lying near the Fermi level. The ARPES data reveals the existence of Dirac cone at the K point, a finding which is corroborated by our DFT calculations. These findings present detailed electronic structure capable of hosting correlation-driven phenomenon in this novel ferromagnetic kagome metal. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2311_11488 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observation of multiple flat bands and van Hove singularities in the distorted kagome metal NdTi3Bi4 Mondal, Mazharul Islam Sakhya, Anup Pradhan Sprague, Milo Ortiz, Brenden R. Matzelle, Matthew Kumay, Arun K Seal, Avike Ghosh, Barun Bansil, Arun Neupane, Madhab Materials Science Mesoscale and Nanoscale Physics Kagome materials have attracted enormous research interest recently owing to their diverse topological phases and manifestation of electronic correlation. Here, we present the electronic structure of a distorted ferromagnetic kagome metal, NdTi3Bi4, exhibiting a transition temperature of 9 K. Our investigation employs a combination of angle-resolved photoemission spectroscopy (ARPES) measurements and density functional theory (DFT) calculations. We discover the presence of two flat bands which are found to originate from the kagome structure formed by Ti atoms with major contribution from Ti dxy and Ti dx2-y2 orbitals. We also observed multiple van Hove singularities (VHSs) in its electronic structure, with one VHS lying near the Fermi level. The ARPES data reveals the existence of Dirac cone at the K point, a finding which is corroborated by our DFT calculations. These findings present detailed electronic structure capable of hosting correlation-driven phenomenon in this novel ferromagnetic kagome metal. |
| title | Observation of multiple flat bands and van Hove singularities in the distorted kagome metal NdTi3Bi4 |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2311.11488 |