Effects of spin-orbit coupling on the electronic properties of the buckled III–V monolayers

In this work, the electronic properties of the buckled III–V monolayers are compared with and without spin–orbit coupling, and the effects of spin–orbit coupling (SOC) on the electrical properties are investigated. The effective mass, deformation potential, and mobility for both states are studied, and the amount of spin correction is obtained where SOC correction is great for heavy compounds. In addition, the SOC causes the band splitting in the valence band and the spin splitting in both conduction and valence bands. The correlation of the band and spin splitting with different power of atomic numbers has been investigated. We find that the band splitting has a high correlation with the atomic number of group-V elements, while the spin splitting with the sum of the atomic number of the two elements shows a high correlation.