Artículos de revistas
Smooth interface effects on the Raman scattering in zinc-blende AlN/GaN superlattices
Registro en:
Physical Review B. American Physical Soc, v. 61, n. 19, n. 13060, n. 13063, 2000.
0163-1829
WOS:000087159100092
10.1103/PhysRevB.61.13060
Autor
Bezerra, EF
Freire, VN
Teixeira, AMR
Silva, MAA
Freire, PTC
Mendes, J
Lemos, V
Institución
Resumen
Raman spectra of (AlN)(8-delta)/(AlxGa1-xN)(delta)/(GaN)(8-delta)/(AlxGa1-xN)(delta) superlattices with interface thickness varying between delta = 0 and delta = 3 are calculated. The influence of the nonabrupt interface related broadening is described in the complete range of scattering, with special attention to the modes giving stronger contribution to the Raman intensity. It is shown that the dispersion of folded acoustic phonons does not change appreciably with the interface smoothing. For delta = 0 the Raman spectra display new peaks due to the enhancement of some confined optic modes. 61 19 13060 13063