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- W3048583658 abstract "Abstract (Ga, Mn)As dilute magnetic semiconductor (DMS) is very promising for future spintronic devices, however, the lower Curie temperature ( T c ) limits the applications. Here, using first-principles calculation based on density functional theory, we investigate the effect of the surface dangling bonds (SDBs) on the magnetic properties of Mn-doped GaAs nanowires (NWs). The results show that As (Ga)-SDBs are equivalent to holes (electrons) doping, giving rise to the magnetic moments on the surfaces of GaAs NWs. Further in the Mn-doped GaAs NWs, the SDBs can effectively regulate the total magnetic moments, due to charge transfers between the Mn-3d orbitals and the residual SDBs, which is analyzed by a carrier modulation model. Most importantly, the As-SDBs can stabilize the ferromagnetic (FM) states and enhance the T c in Mn-doped GaAs NWs because of their shallow acceptor level with lower energy compared with Mn-3d level." @default.
- W3048583658 created "2020-08-18" @default.
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- W3048583658 date "2020-11-01" @default.
- W3048583658 modified "2023-10-15" @default.
- W3048583658 title "Surface dangling bonds dependent magnetic properties in Mn-doped GaAs nanowires" @default.
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- W3048583658 doi "https://doi.org/10.1016/j.physleta.2020.126815" @default.
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