Journal of Semiconductors, Volume. 41, Issue 12, 122501(2020)
Prediction and observation of defect-induced room-temperature ferromagnetism in halide perovskites
Fig. 1. (Color online) Crystal and electronic structure characterizations. High-resolution TEM images of CsPb1–
Fig. 2. (Color online) First-principle calculations. (a) The 3 × 3 × 3 CsPbBr3 supercells used in DFT calculations. Left: perfect lattice, where the Br atom indicated by the blue arrow will be removed to create a VBr. Right: relaxed lattice with the presence of a VBr. (b) DCD of the perfect (left) and defective (right) CsPbBr3. High (low) charge density corresponds to charge accumulation (depletion) regimes. (c) Spin-resolved total and partial DOSs of the perfect and defective CsPbBr3 supercells.
Fig. 3. (Color online) Magnetic properties of RT-synthesized LHPs. (a) Magnetization versus
Fig. 4. (Color online) 3
Fig. 5. (Color online) Schematic of vacancy-induced ferromagnetism. A donor electron associated with a VBr polarizes the surrounding lattices within its hydrogenic orbital, leading to the formation of a magnetic polaron (gray circles). Due to the shallow nature of the VBr, the magnetic polarons have extended wave functions. As a result, the overlap of the magnetic polarons aligns the spins of the VBr (red arrows) via exchange coupling, producing long-range spin ordering (
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Zhiguo Sun, Bo Cai, Xi Chen, Wenxian Wei, Xiaoming Li, Dandan Yang, Cuifang Meng, Ye Wu, Haibo Zeng. Prediction and observation of defect-induced room-temperature ferromagnetism in halide perovskites[J]. Journal of Semiconductors, 2020, 41(12): 122501
Category: Articles
Received: Apr. 19, 2020
Accepted: --
Published Online: Sep. 9, 2021
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