Temperature variation of the phonon frequencies in V3Si along the [110] direction by the X-ray inelastic scattering

The investigation of the intensity of X-ray diffuse scattering by the lattice vibrations along the second-order symmetry axis in V₃Si single crystals is performed at different temperatures from 300 to 8 K and the phonon dispersion curves in this direction are determined. It is found that the phonon frequencies of all modes decrease with lowering temperature.