Calculation of magnetodonor states in InP and polaron effects

• Autor(a) principal: Bruno-Alfonso, Alexys [UNESP]
• Data de Publicação: 2009
• Outros Autores: Hai, Guo-Qiang
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1142/s0217979209062736; http://hdl.handle.net/11449/231878
• topic: Fröhlich interaction; Magnetodonor; Wigner-Brillouin perturbation theory

Far-infrared transitions in polar semiconductors are known to be affected by the presence of shallow donor impurities, external magnetic fields and the electron-LO-phonon interaction. We calculate the magnetodonor states in indium phosphide by a diagonalization procedure, and introduce the electron-phonon interaction by the Fröhlich term. The main effects of this perturbation are calculated by a multi-level version of the Wigner-Brillouin theory. We determine the transition energies, from the ground state to excited states, and find good qualitative agreement with recently reported absorption-spectroscopy measurements in the 100-800 cm-1 range, with applied magnetic fields up to 30 T. Our calculations suggest that experimental peak splittings in the 400-450 cm-1 range are due to the electron-phonon interaction. © 2009 World Scientific Publishing Company.