Properties of Silicene nanoribbons when doped with two phosphorus atoms in the presence of an external field

Silicene nanoribbons (SNRs) are a new step in modern engineering science. Doping another atom into SNRs creates new materials with many advantages. There are two silicon atoms replaced by two phosphorus atoms per unit cell of SNRs. There are three doping systems studied here: meta, ortho, and para system. The theory used to study in this work is density functional theory (DFT), the computations of the energy of fomation give us an optimal configuration. The structure of energy bands and states of system will be drawn, surveyed, and analyzed. The external electric field contributes significantly to the system, and changes the electrical properties of the system. The results will be analyzed carefully when comparing systems with external electric fields and systems without external electric fields.