铁磁性
材料科学
兴奋剂
电子
凝聚态物理
单层
费米能级
联轴节(管道)
电子转移
费米面
过渡金属
纳米技术
化学
物理
物理化学
量子力学
催化作用
冶金
生物化学
作者
Guoqiang Ren,Yilv Guo,Shaodong Zhang,Xiaoshu Gong,Tingbo Zhang,Xiaojiang Yu,Shijun Yuan,Jinlan Wang
标识
DOI:10.1007/s11467-023-1297-z
摘要
As a two-dimensional material with a hollow hexatomic ring structure, Néel-type anti-ferromagnetic (AFM) GdI3 can be used as a theoretical model to study the effect of electron doping. Based on first-principles calculations, we find that the Fermi surface nesting occurs when more than 1/3 electron per Gd is doped, resulting in the failure to obtain a stable ferromagnetic (FM) state. More interestingly, GdI3 with appropriate Mg/Ca doping (1/6 Mg/Ca per Gd) turns to be half-metallic FM state. This AFM–FM transition results from the transfer of doped electrons to the spatially expanded Gd-5d orbital, which leads to the FM coupling of local half-full Gd-4f electrons through 5d–4f hybridization. Moreover, the shortened Gd–Gd length is the key to the formation of the stable ferromagnetic coupling. Our method provides new insights into obtaining stable FM materials from AFM materials.
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