Abstract
AbstractThe phonon dispersion relations of superconducting compound Nb3Ge are calculated using an angular force constant model, the analysis being limited to third neighbour interactions only. The force constants are evaluated by fitting them to the measured values of phonons at the zone centre. The calculated results are found to be in very good agreement with the experiment in the case of Nb3Ge. With the help of this analysis the complete set of phonon dispersion relations in Nb3(Al–Ge) along the principal symmetry directions is determined. The obtained results nearly reproduce the measured Raman active phonons for Nb3(Al–Ge).
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