Sixfold fermion near the Fermi level in cubic PtBi2
| Autor: | Thirupathaiah, S., Kushnirenk, Y. S., Koepernik, K., Piening, B. R., Buechner, B., Aswartham, S., Brink, J. van den, Borisenko, S. V., Fulga, I. C. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | SciPost Phys. 10, 004 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.21468/SciPostPhys.10.1.004 |
| Popis: | We show that the cubic compound PtBi2, is a topological semimetal hosting a sixfold band touching point in close proximity to the Fermi level. Using angle-resolved photoemission spectroscopy, we map the bandstructure of the system, which is in good agreement with results from density functional theory. Further, by employing a low energy effective Hamiltonian valid close to the crossing point, we study the effect of a magnetic field on the sixfold fermion. The latter splits into a total of twenty Weyl cones for a Zeeman field oriented in the diagonal, [111] direction. Our results mark cubic PtBi2, as an ideal candidate to study the transport properties of gapless topological systems beyond Dirac and Weyl semimetals. Comment: 15 pages, 6 figures; this is the final, published version |
| Databáze: | arXiv |
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