Distinct topological properties in Ce monopnictides having correlated f electrons: CeN vs. CeBi
SCOPUS
- Title
- Distinct topological properties in Ce monopnictides having correlated f electrons: CeN vs. CeBi
- Authors
- RYU, DONGCHOON; Kim, Junwon; Kim, Kyoo; Kang, Chang-Jong; J. D. Denlinger; MIN, BYUNG IL
- Date Issued
- 2020-03
- Publisher
- American Physical Society
- Abstract
- The hitherto-studied topological nature in Ce monopnictides (CePn) has been discussed based solely on their
p-d band inversion, despite the existence of f electrons. Interestingly, however, we have found that CeN, the
lightest CePn, has nontrivial Z2 topology originating from f -d band inversion. Through density-functional
theory and dynamical mean-field theory calculations, we have demonstrated that, among the correlated f -
electron systems of CePn, the lightest CeN is a coherent narrow f -band system having an f -d band-inverted
topological Kondo insulator nature, whereas the heaviest CeBi is a strongly localized f -electron system having
a conventional p-d band-inverted topological insulator nature. For CeN, topological surface states (TSSs) are
identified clearly on three different (001), (110), and (111) surfaces. For CeBi, however, TSSs are identified only
on the (111) surface. Furthermore, intriguing topological-crystalline insulator-type TSSs are identified on the
(110) surfaces of both CeN and CeBi.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/107913
- DOI
- 10.1103/PhysRevResearch.2.012069
- ISSN
- 2643-1564
- Article Type
- Article
- Citation
- Physical Review Research, vol. 2, no. 1, page. 012069, 2020-03
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.