Abstract
The electronic, magnetic and optical properties of zigzag ZnO nanoribbons under electric field and strains are calculated using density functional theory. The results show that Z8-ZnONRs have ferromagnetism, which is mainly caused by the spin polarization of O atoms of O-terminated edge. Under the action of Y-axial electric field, the system has ferromagnetism, which is mainly contributed by O-2p and Zn-3d orbital electrons. Z8-ZnONRs have the characteristics of high-energy storage and low loss. The application of Y-axial electric field can enhance the absorption of visible light. The application of strains can adjust the electronic structures of Z8-ZnONRs and the system remains magnetic. Which mainly comes from the contribution of O atoms of O-terminated edge. The results show that the coupling of electric field and strains makes the system change from ferromagnetic metal to magnetic semiconductor.
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