Prediction of inelastic light scattering spectra from electronic collective excitations in GaAs/AlGaAs core-multishell nanowires
comunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
comunitat-uji-handle4:
INVESTIGACIONMetadatos
Título
Prediction of inelastic light scattering spectra from electronic collective excitations in GaAs/AlGaAs core-multishell nanowiresFecha de publicación
2015Editor
American Physical SocietyISSN
2469-9950; 2469-9969Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.245303Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
We predict inelastic light scattering spectra from electron collective excitations in a coaxial quantum well
embedded in a core-multishell GaAs/AlGaAs nanowire. The complex composition, the hexagonal cross section,
and ... [+]
We predict inelastic light scattering spectra from electron collective excitations in a coaxial quantum well
embedded in a core-multishell GaAs/AlGaAs nanowire. The complex composition, the hexagonal cross section,
and the remote doping of typical samples are explicitly included, and the free electron gas is obtained by
a density functional theory (DFT) approach. Inelastic light scattering cross sections due to charge and spin
collective excitations belonging to quasi-one-dimensional (1D) and quasi-2D states, which coexist in such radial
heterostructures, are predicted in the nonresonant approximation from a fully three-dimensional multisubband
time-dependent DFT (TDDFT) formalism. We show that collective excitations can be classified in azimuthal,
radial, and longitudinal excitations, according to the associated density fluctuations, and we suggest that their
character can be exposed by specific spectral dispersion of inelastic light scattering along different planes of the
heterostructure. [-]
Publicado en
PHYSICAL REVIEW B 91, 245303 (2015)Derechos de acceso
©2015 American Physical Society
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