Continuum elastic sphere vibrations as a model for low-lying optical modes in icosahedral quasicrystals

E. Duval, L. Saviot, A. Mermet +1

The nearly dispersionless, so-called "optical" vibrational modes observed by inelastic neutron scattering from icosahedral Al-Pd-Mn and Zn-Mg-Y quasicrystals are found to correspon…