Structural and electronic properties of a single C chain doped zigzag silicene nanoribbon

The structural and electronic properties of zigzag edge silicene nanoribbons (ZSiNRs) doped with a single C chain have been studied by first-principles projector augmented wave (PAW) potential within the density function theory (DFT) framework. The results show that the C chain is almost close to a straight one which results in a transverse contraction near C chain and thus the ribbon width. The C–Si and Si–H bonds are typical ionic bonds while the C–H bond is a covalence bond. ZSiNRs doped with a single C chain are all metallic independent of the position of the C chain. All these results have been explained satisfactory from the electronegativity difference and the bound force to the electrons because of the atom radius difference between the elements.