Two-Dimensional Hexagonal Transition-Metal Oxide for Spintronics.
Two-dimensional materials have been the hot subject of studies due to their great potential in applications. However, their applications in spintronics have been blocked by the difficulty in producing ordered spin structures in 2D structures. Here we demonstrated that the ultrathin films of recently experimentally realized wurtzite MnO can automatically transform into a stable graphitic structure with ordered spin arrangement via density functional calculation, and the stability of graphitic structure can be enhanced by external strain. Moreover, the antiferromagnetic ordering of graphitic MnO single layer can be switched into half-metallic ferromagnetism by small hole-doping, and the estimated Curie temperature is higher than 300 K. Thus, our results highlight a promising way toward 2D magnetic materials.
†Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education) and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, P. R. China.
Erjun
E
Kan
†Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education) and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, P. R. China.
Ming
M
Li
‡Department of Chemistry - Ångström Laboratory, Uppsala Universitet, Box 538 SE-751 21, Uppsala, Sweden.
Shuanglin
S
Hu
†Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education) and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, P. R. China.
Chuanyun
C
Xiao
⊥Key Laboratory of Computational Physical Sciences (Ministry of Education), State Key Laboratory of Surface Physics, and Department of Physics, Fudan University, Shanghai 200433, P. R. China.
Hongjun
H
Xiang
†Key Laboratory of Soft Chemistry and Functional Materials (Ministry of Education) and Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, P. R. China.
Kaiming
K
Deng
density functional theory; spintronics; transition-metal oxide; two-dimensional magnetic materials