Tomonori Nakamura
(International Center for Materials Nanoarchitectonics/Nano-System Field/Surface Quantum Phase Materials Group, National Institute for Materials Science
)
;
Yitao Chen
(Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University)
;
Ryohei Nemoto
(Research Center for Materials Nanoarchitectonics (MANA)/Quantum Materials Field/Surface Quantum Phase Materials Group, National Institute for Materials Science)
;
Wenxuan Qian
(Research Center for Materials Nanoarchitectonics (MANA)/Quantum Materials Field/Surface Quantum Phase Materials Group, National Institute for Materials Science)
;
Yuto Fukushima
(Institute for Solid State Physics, The University of Tokyo)
;
Kaishu Kawaguchi
(Institute for Solid State Physics, The University of Tokyo)
;
Ryo Mori
(Institute for Solid State Physics, The University of Tokyo)
;
Takeshi Kondo
(Institute for Solid State Physics, The University of Tokyo)
;
Youhei Yamaji
(Research Center for Materials Nanoarchitectonics (MANA)/Quantum Materials Field/Quantum Materials Modeling Group, National Institute for Materials Science)
;
Shunsuke Tsuda
(Center for Basic Research on Materials/Advanced Materials Characterization Field/Photoemission Spectroscopy Group, National Institute for Materials Science)
;
Koichiro Yaji
(Center for Basic Research on Materials/Advanced Materials Characterization Field/Photoemission Spectroscopy Group, National Institute for Materials Science)
;
Takashi Uchihashi
(Research Center for Materials Nanoarchitectonics (MANA)/Quantum Materials Field/Surface Quantum Phase Materials Group, National Institute for Materials Science)
Collection
Citation
Description:
(abstract)Moiré superlattices consisting of two-dimensional materials have attracted immense attention because of emergent phenomena such as flat band-induced Mott insulating states and unconventional superconductivity. However, the effects of spin-orbit coupling on these materials have not yet been fully explored. Here, we show that single- and double-bilayer antimony honeycomb lattices, referred to as antimonene, form moiré superlattices on a Bi(111) substrate due to lattice mismatch. Scanning tunnelling microscopy (STM) measurements reveal the presence of spectral peaks near the Fermi level, which are spatially modulated with the moiré period. Angle-resolved photoemission spectroscopy (ARPES) combined with density functional theory calculations clarify the surface band structure with saddle points near the Fermi level, which allows us to attribute the observed STM spectral peaks to the van Hove singularity. Moreover, spin-resolved ARPES measurements reveal that the observed surface states are Rashba-type spin-polarized. The present work has significant implications in that Fermi surface instability and symmetry breaking may emerge at low temperatures, where the spin degree of freedom and electron correlation also play important roles.
Rights:
Keyword: moiré superlattice, antimonene, Bi(111) surface, van Hove singularity, spin-orbit coupling, atomic layer, Rashba-type spin polarization
Date published: 2024-08-26
Publisher: Springer Nature
Journal:
- Communications Materials (ISSN: 26624443) vol. 5 p. 1-9 167
Funding:
- JSPS 20H05621
- JSPS 22H01961
- JSPS 20K15133
- JSPS 22H01183
- JSPS 23H03818
- JSPS 23H04524
- MEXT (The World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics)
- ATLA JPJ004596 (The Innovative Science and Technology Initiative for Security)
Manuscript type: Publisher's version (Version of record)
MDR DOI:
First published URL: https://doi.org/10.1038/s43246-024-00615-z
Related item:
Other identifier(s):
Contact agent:
Updated at: 2024-08-29 08:30:22 +0900
Published on MDR: 2024-08-29 08:30:22 +0900
| Filename | Size | |||
|---|---|---|---|---|
| Filename |
Nakamura_et_al-2024-Communications_Materials.pdf
(Thumbnail)
application/pdf |
Size | 3.79 MB | Detail |