自旋电子学
材料科学
铁磁性
过渡金属
密度泛函理论
插层(化学)
单斜晶系
结晶学
凝聚态物理
三斜晶系
范德瓦尔斯力
纳米技术
化学物理
晶体结构
无机化学
计算化学
分子
化学
物理
生物化学
催化作用
有机化学
作者
Yahuan Huan,Tiantian Luo,Xiaocang Han,Jun Ge,Fangfang Cui,Lijie Zhu,Jingyi Hu,Feipeng Zheng,Xiaoxu Zhao,Lili Wang,Jian Wang,Yanfeng Zhang
标识
DOI:10.1002/adma.202207276
摘要
Exploring new-type 2D magnetic materials with high magnetic transition temperature and robust air stability has attracted wide attention for developing innovative spintronic devices. Recently, intercalation of native metal atoms into the van der Waals gaps of 2D layered transition metal dichalcogenides (TMDs) has been developed to form 2D non-layered magnetic TMDs, while only succeeded in limited systems (e.g., Cr2 S3 , Cr5 Te8 ). Herein, composition-controllable syntheses of 2D non-layered iron selenide nanosheets (25% Fe-intercalated triclinic Fe5 Se8 and 50% Fe-intercalated monoclinic Fe3 Se4 ) are firstly reported, via a robust chemical vapor deposition strategy. Specifically, the 2D Fe5 Se8 exhibits intrinsic room-temperature ferromagnetic property, which is explained by the change of electron spin states from layered 1T'-FeSe2 to non-layered Fe-intercalated Fe5 Se8 based on density functional theory calculations. In contrast, the ultrathin Fe3 Se4 presents novel metallic features comparable with that of metallic TMDs. This work hereby sheds light on the composition-controllable synthesis and fundamental property exploration of 2D self-intercalation induced novel TMDs compounds, by propelling their application explorations in nanoelectronics and spintronics-related fields.
科研通智能强力驱动
Strongly Powered by AbleSci AI