2023-12-132023-12-132008MACHADO, P. C. M.; OSÓRIO, F. A. P.; BORGES, A. N. Polaronic effects on the collective excitation energies in a quantum wire. Microelectronics Journal, Amsterdam, v. 39, n. 3/4, p. 463-465, 2008. DOI: 10.1016/j.mejo.2007.07.029. Disponível em: https://www.sciencedirect.com/science/article/pii/S002626920700170X. Acesso em: 14 set. 20230026-2692https://www.sciencedirect.com/science/article/pii/S002626920700170XIn this work we report a investigation of the plasmon–longitudinal-optical (LO) phonon interaction effects on the intersubband and intrasubband collective excitation energies in a GaAs–AlνGa1−νAs rectangular quantum well wire. We observe a resonant split of the collective excitation energy into two branches, one with energy lower and other with energy higher than the LO-optical phonon energy ℏωLO. Our calculations are performed using a self-consistent field approximation, which includes the local-field correction within the Singwi, Tosi, Land, and Sjolander (STLS) theory at zero temperature and assuming a three-subband model, where only the first subband is occupied by electrons. The potential confining effects on the collective energies were also considered.engAcesso RestritoLongitudinal optical phononPlasmonGaAs–AlGaAs quantum wireArtigo10.1016/j.mejo.2007.07.029