Surface structure study and structure determination of (√3 × √3)R 30° phase of Si-adsorption on Ni(111) by LEED

The phase evolution of Si on Ni (111) was studied by LEED and AES. A new phase of Si on Ni (111) was found along with the previously reported (√3 × √3)R 30° phase. The surface structure of (√3 × √3)R 30° phase had determined, with chemical composition of Ni
₂
Si, by using low-energy electron diffraction (LEED) analysis. The obtained nickel silicide would be helpful for understanding the formation of Schottky barrier at semiconductor-metal interface.