The evolution of chemical ordering and property in Fe_(1+x)Se_(2)upon intercalation ratios  

作　　者：Zijing Zhao Xiaocang Han Shengcai Zhu Zhi Fang Ziyi Han Zhongyu Liang Bailing Li Biao Zhang Wei Li Zhaochu Luo Licong Peng Xiaoxu Zhao Jiadong Zhou Song Gao Chengxin Wang Mathias Kläui Yanglong Hou 

机构地区：[1]School of Materials Science and Engineering,Beijing Key Laboratory for Magnetoelectric Materials and Devices,Peking University,Beijing 100871,China [2]School of Materials,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China [3]School of Physics and Optoelectronic Engineering,Beijing University of Technology,Beijing 100124,China [4]State Key Laboratory for Artificial Microstructure&Mesoscopic Physics,School of Physics,Peking University,Beijing 100871,China [5]Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(MOE),School of Physics,Beijing Institute of Technology,Beijing 100081,China [6]School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China [7]School of Materials Science and Engineering,Sun Yat-sen University,Guangzhou 510275,China [8]Institute of Physics,Johannes Gutenberg University Mainz,Mainz 55128,Germany

出　　处：《National Science Review》2025年第2期159-170,共12页国家科学评论(英文版)

基　　金：supported by the National Key Research and Development Program of China(2022YFA1204003 and 2022YFA1203902);the National Natural Science Foundation of China(92263203,52027801 and 52301300);the China-Germany Collaboration Project(M-0199).

摘　　要：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,Fe1.5 Se_(2) and Fe1.6 Se_(2) 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.

关 键 词：INTERCALATION Fe-intercalated 2D materials room-temperature magnetism 

分 类 号：TB3[一般工业技术—材料科学与工程]