Benvenuti nell'Anagrafe della Ricerca d'Ateneo
La valutazione delle attività di ricerca che si svolgono nelle università ha assunto un'importanza rilevante sia per l'intero sistema universitario sia all'interno di ogni singolo ateneo. Roma Tre si è quindi dotata di idonei strumenti informativi in grado di supportare al meglio le azioni di monitoraggio e di valutazione delle attività di ricerca svolte nei propri dipartimentied ha realizzato una Anagrafe della Ricerca di Ateneo.
EnglishRecent 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 | |
| Autori: | ||
| Data di pubblicazione: | 2021 | |
| Rivista: | ||
| 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 |
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