研究目的
To clarify the effect in bulk systems, the interplay between ferroelectricity, orbital character, and atomic SOC that causes it, and in doing so identifies the criteria for finding other materials with large Rashba splitting.
研究成果
The study concludes that the large spin splitting in bulk ferroelectric GeTe is due to the interplay between orbital angular momentum, atomic SOC, the crystal field, and the electric polarization. The results suggest design rules for new materials with strong Rashba-like spin splitting, which could enable spintronic devices with electric control of spin polarization.
研究不足
The study focuses on bulk ferroelectric GeTe with high atomic SOC, and the findings may not be directly applicable to other materials or conditions without further research.
1：Experimental Design and Method Selection:
The study employs first-principles calculations and a tight-binding formalism based on Wannier functions to explore the microscopic origin of the giant Rashba-like spin splitting in the band structure of bulk ferroelectric GeTe.
2：Sample Selection and Data Sources:
Germanium telluride (GeTe) is used as a typical example of the effects discussed.
3：List of Experimental Equipment and Materials:
Quantum-Espresso package for nonrelativistic DFT calculations and Wannier90 software for Wannier interpolation of the bands.
4：Experimental Procedures and Operational Workflow:
The study involves performing ab initio calculations, Wannier interpolation, and adding atomic SOC by a term to the Wannier tight-binding Hamiltonian.
5：Data Analysis Methods:
The analysis includes comparing the proposed band dispersion with the dispersions of the first and third valence bands.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
