Raman active modes of NiSi crystal

摘要

Raman scattering intensities of the NiSi Raman-active modes have been calculated with three Raman measurement configurations, which can be used for the symmetry assignment of the NiSi Raman peaks. Raman-active vibrations of the NiSi crystal have also been theoretically studied. Results show that the lattices with A(g) and B-2g modes vibrate only in the plane normal to the NiSi[010] direction while the lattices with B-1g and B-3g modes vibrate only along the NiSi[010] axis. Based on such study, the relationship between the anisotropic strain distribution in the NiSi thin film and the Raman peak shifts has been briefly discussed.