The evolution of chemical ordering and property in Fe1+<i>x</i>Se2 upon intercalation ratios
Intercalation has been considered as an effective method to explore innovative two-dimensional (2D) materials and modify their properties. However, the relationship between intercalation concentration, structure, and property remains a largely uncharted territory, and the controllable synthesis of desired intercalated phases faces challenges. Here, a general intercalated rule for the effect of self-intercalation ratio on atomic arrangements is revealed. Then, the controllable synthesis of a series of Fe-intercalated 2D materials is realized. Scanning transmission electron microscopy illustrates that their intercalation structures undergo disordered/ordered/half-ordered/ordered transformation, which confirms the intercalated rule and proposes a new structure termed half-ordered intercalation. Notably, their magnetic and electrical properties can be significantly modulated by intercalation. Orderly intercalated nanoflakes possess room-temperature magnetism with composition-regulated magnetic domains. Moreover, Fe<sub>1.5</sub>Se<sub>2</sub> and Fe<sub>1.6</sub>Se<sub>2</sub> are scarce half-metallic materials showing different magneto-resistance behaviors. This work would guide the design and synthesis of new intercalated materials, and deepen the understanding of the relationship between structure and properties.
Authors
- Zijing Zhao (ORCID: https://orcid.org/0000-0001-8618-7002)
- Xiaoxu Zhao (ORCID: https://orcid.org/0000-0001-9746-3770)
- Xiaocang Han (ORCID: https://orcid.org/0000-0001-8458-5568)
- Mathias Kläui (ORCID: https://orcid.org/0000-0002-4848-2569)
- Bailing Li
- Zhongyu Liang (ORCID: https://orcid.org/0000-0002-7872-7571)
- Chengxin Wang (ORCID: https://orcid.org/0000-0001-8355-6431)
- Zhi Fang (ORCID: https://orcid.org/0000-0001-7312-7131)
- Zhaochu Luo (ORCID: https://orcid.org/0000-0002-7543-3244)
- Jiadong Zhou (ORCID: https://orcid.org/0000-0001-5268-2136)
- Shengcai Zhu (ORCID: https://orcid.org/0000-0003-3311-6723)
- Yanglong Hou (ORCID: https://orcid.org/0000-0003-0579-4594)
- Wei Li (ORCID: https://orcid.org/0000-0003-4475-531X)
- Biao Zhang (ORCID: https://orcid.org/0000-0003-0577-4198)
- Licong Peng (ORCID: https://orcid.org/0000-0002-8580-2285)
- Xiangguo Li
- Song Gao (ORCID: https://orcid.org/0000-0003-0998-8791)
- Ziyi Han (ORCID: https://orcid.org/0009-0001-9456-9948)
Institutions
- Beijing Institute of Technology (CN)
- Sun Yat-sen University (CN)
- Johannes Gutenberg University Mainz (DE)
- Peking University (CN)
- Beijing University of Technology (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
Publication Details
- Journal
- National Science Review
- Published
- 2024-11-29
- DOI
- https://doi.org/10.1093/nsr/nwae430
- Citations
- 6
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.70
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China