Raman study of GaAs quantum wires grown with partial filling of corrugated (311)A AlAs surfaces

Phenomenological model for Raman spectra calculating based on “bond charge” taking into account deformation and electro‐optical mechanisms, including Fröhlich scattering

“…Previously, to calculate the eigenwavenumbers and eigenvalues of phonons, we used the extended Born model taking into account the Coulomb interaction in the “rigid ions” model 6–8 . This made it possible to calculate the Raman spectra only taking into account the deformation mechanism 6–8 .…”

“…In addition, if fitting parameters are not involved in these models, their accuracy still does not satisfy the requirements for an adequate description of experimental spectra when it comes to finding phonon wavenumbers with an accuracy of tenths of a reciprocal centimeter. Therefore, in the foreseeable future, phenomenological models for calculating Raman spectra [4][5][6] will be in demand, calculations with which can be performed using ordinary computers.…”

“…Previously, to calculate the eigenwavenumbers and eigenvalues of phonons, we used the extended Born model taking into account the Coulomb interaction in the "rigid ions" model. [6][7][8] This made it possible to calculate the Raman spectra only taking into account the deformation mechanism. [6][7][8] In the present work, to calculate the eigenwavenumbers and eigenvalues of phonons, the adiabatic "bond charge" (BC) model was used.…”

“…[6][7][8] This made it possible to calculate the Raman spectra only taking into account the deformation mechanism. [6][7][8] In the present work, to calculate the eigenwavenumbers and eigenvalues of phonons, the adiabatic "bond charge" (BC) model was used. This made it possible to include the electro-optical mechanism in the calculations, as well as to take into account the Fröhlich scattering.…”