Sagittal elastic waves in cubic superlattices

Sagittal elastic waves in Fibonacci superlattices

“…The Green function for elastic waves propagating along the ͓100͔ direction of cubic crystals having ͓001͔ interfaces was given in Ref. 5. The elastic data employed in our calculations are given in Table I.…”

Transverse elastic waves in Fibonacci superlattices

“…It was seen that piezoelectricity did not greatly modify the frequencies of the elastic waves, but that it could modify other properties like spatial localization, or the higher frequency regions [5] of these excitations. It would then be interesting to see if the coupling of the elastic displacement to the electric field introduces more drastic effects on the Fibonacci spectrum, or not.…”

Elastic waves in polytype superlattices

“…In figure 7(a) we present the spectral strength of a mode of the BeO-CdSe-CdS superlattice studied in figure 4(a) corresponding to q = 0 cm −1 , κd = 2.5 × 10 4 cm −1 and ω = 5.55 GHz. The spectral strength was obtained by calculation of the local density of states at the different values of z in the superlattice period, which is directly obtained from the Green function of the whole system given by (5). It can be seen that the mode is preferentially localized in the BeO layer, but it exhibits its maxima at the interfaces of the BeO and the other constituent materials.…”

“…The study of elastic waves in superlattices has been a subject of interest in the last ten years [1][2][3][4][5][6][7][8][9][10]. Elastic waves have also been studied in semi-infinite superlattices [11][12][13][14].…”