Recent theoretical calculations predict the presence of Dirac nodal lines with π Berry phase and related topological surface states in elemental alkaline-earth metals. Here we provide experimental and theoretical evidence for the existence of similar nodal lines also in hexagonal close-packed Yb, an element of the lanthanide series, in the limit of zero spin-orbit coupling. These topological properties emerge after taking into account self-energy corrections, which permit one to correctly describe the experimental low-energy electronic structure of Yb. By angle-resolved photoemission spectroscopy we demonstrate the occurrence of topological surface states in Yb which are robust in the presence of the large spin-orbit coupling.
Sheverdyaeva, P.M., Offi, F., Gardonio, S., Novinec, L., Trioni, M.I., Ceresoli, D., et al. (2021). Topological properties and self-energy effects in elemental Yb. PHYSICAL REVIEW. B, 104, 195138 [10.1103/PhysRevB.104.195138].
Titolo: | Topological properties and self-energy effects in elemental Yb | |
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Data di pubblicazione: | 2021 | |
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Citazione: | Sheverdyaeva, P.M., Offi, F., Gardonio, S., Novinec, L., Trioni, M.I., Ceresoli, D., et al. (2021). Topological properties and self-energy effects in elemental Yb. PHYSICAL REVIEW. B, 104, 195138 [10.1103/PhysRevB.104.195138]. | |
Abstract: | Recent theoretical calculations predict the presence of Dirac nodal lines with π Berry phase and related topological surface states in elemental alkaline-earth metals. Here we provide experimental and theoretical evidence for the existence of similar nodal lines also in hexagonal close-packed Yb, an element of the lanthanide series, in the limit of zero spin-orbit coupling. These topological properties emerge after taking into account self-energy corrections, which permit one to correctly describe the experimental low-energy electronic structure of Yb. By angle-resolved photoemission spectroscopy we demonstrate the occurrence of topological surface states in Yb which are robust in the presence of the large spin-orbit coupling. | |
Handle: | http://hdl.handle.net/11590/394689 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |