The acoustic waves in Li are investigated by solving the Christoffel equations. Theoretical
calculations of the three dimensional slowness surfaces give insights into the mixing of …

The anisotropy and phonon focusing of AlLi are investigated using ultrasoft
pseudopotentials within the generalized gradient approximation correction in the frame of …

The elastic properties, lattice wave propagation and phonon focusing of TiAl are studied in
detail based on Bond matrices model and lattice-dynamical method. The results contain …

It is shown that enormous numerical difficulties occur for a simple metal like lithium when
realistic wavefunctions are used in Pick's formulation (1970) of lattice dynamics based on …

We have investigated the anisotropy and phonon focusing of NiAl using ultrasoft
pseudopotentials within the generalized gradient approximation correction in the frame of …

Low-frequency acoustic experiments are reported on Li-doped KCl crystals and pure KCl at
temperatures between 70mK and 30K. The temperature dependence of the transverse …

The spectrum and polarization vectors of phonons in alkali and noble metals belonging to
cubic crystals with positive anisotropy of elastic moduli are calculated. They are compared …

Abstract The four A 1− TO Γ phonon frequencies in lithium tantalate are calculated in the
frozen-phonon approach from first principles using the full-potential linearized augmented …

Abstractauthoren The phonon dispersions of the ferro‐and paraelectric phase of LiTaO are
calculated within density‐functional perturbation theory. The longitudinal optical phonon …

We have calculated the electronic structure and the vibrational properties of bulk Li in the fcc
and bcc structures using large super-cells and an ab initio, non-local pseudopotential …