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采用基于密度泛函理论(DFT)的全势线性缀加平面波法(FP-LAPW)研究了过渡金属Ti,Cu,Zn掺杂Al N纳米片的电子结构、磁性和稳定性.结果表明,Ti,Cu,Zn单掺杂均表现出半金属铁磁性,磁性主要是由于杂质原子的3d态与近邻N原子的2p态的轨道杂化.形成能的计算结果表明Ti掺杂Al N体系相对Cu和Zn掺杂结构更稳定.因此,相比于Cu和Zn,Ti掺杂Al N纳米片更适合用来制作稀磁半导体.
The electronic structures, magnetic properties and stability of transition metal Ti, Cu and Zn doped AlN nanosheets were investigated by using the all-potential linearly-added plane wave method (FP-LAPW) based on density functional theory (DFT) , Cu, Zn single-doping showed half-metallic ferromagnetism, the magnetic is mainly due to the 3d state of the impurity atoms and the orbital hybridization of the 2p state of the nearest neighbor N. At formation energy calculation results show that Ti-doped AlN relative to Cu And Zn-doped structure is more stable.Therefore, compared with Cu and Zn, Ti-doped AlN nanosheets more suitable for the preparation of dilute magnetic semiconductors.