Evidence of quasi-2D Fermi surface and non-trivial electronic topology in kagome lattice magnet GdV6Sn6 using de Haas van Alphen oscillations
| Autor: | Dhital, C., Pokharel, G., Wilson, B., Kendrick, I., Asmar, M. M., Graf, D., Guerrero-Sanchez, J., Hernandez, R. Gonzalez, Wilson, S. D. |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Popis: | The shape of the Fermi surface, the effective mass of carriers, and the topologically non-trivial nature of electronic bands of kagome magnet GdV6Sn6 are investigated using de Haas van Alphen (dHvA) oscillations measurements. Our temperature and angle dependent torque magnetometry measurements reveal at least seven different frequencies ranging from ~90 T up to ~9000 T. These frequencies correspond to extremal areas of Fermi surface ranging from ~1% up to 50% of the first Brillouin zone, qualitatively consistent with electronic structure calculations. The angle dependent dHvA oscillations frequencies indicate that all pockets of Fermi surface are mostly two-dimensional. We also find evidence of the presence of lighter (0.58 m0) as well as heavier (2.25 m0) electrons through the analysis of the temperature dependence of dominant frequencies, reflecting the features of correlated and Dirac like dispersions in the electronic structure. The estimation of the Berry phase indicates the topologically non-trivial nature of the lowest frequency band containing lighter electrons. This is consistent with the presence of Dirac-like linear dispersion in the electronic structure. 20 pages, 11 figures |
| Databáze: | OpenAIRE |
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