Study of spacer-layer-tunable ferromagnetic half-metal—ferromagnetic insulator transition in SrVO<sub>3</sub>/SrTiO<sub>3</sub> superlattice<
Acta Physica Sinica(2022)
摘要
In this work, the first-principle calculations based on density functional theory (DFT) are employed to investigate the electronic and magnetic properties of SrVO3/SrTiO3(111) superlattices. Studies show that the transition from ferromagnetic half-metal to ferromagnetic insulator can be achieved by adjusting the thickness of the spacer-layer SrTiO3. The interlayer coupling between the SrVO3 sublayers could occur across two unit-cell (uc) distance of SrTiO3, and the superlattice is ferromagnetic half-metal. When the SrTiO3 sublayers are 3uc, a small band gap (about 0.28 eV) appears in the superlattice. When the SrTiO3sublayersare more than 3uc, the superlattice has a large band gap and exhibits ferromagnetic insulating state. Further studies show that the Ti-V mixed defects play an important role in the transition of metal-insulator. Compared with the ideal interface, the Ti-V mixed interface can inhibit the interlayer coupling and induce the transition of ferromagnetic half-metal to ferromagnetic insulator. These results provide a theoretical basis for the transition of ferromagnetic half-metal to ferromagnetic insulator by adjusting the number of SrTiO3 layers in SrVO3/SrTiO3(111) superlattices.
更多查看译文
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要