Prediction of inelastic light scattering spectra from electronic collective excitations in GaAs/AlGaAs core-multishell nanowires
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Title
Prediction of inelastic light scattering spectra from electronic collective excitations in GaAs/AlGaAs core-multishell nanowiresDate
2015Publisher
American Physical SocietyISSN
2469-9950; 2469-9969Type
info:eu-repo/semantics/articlePublisher version
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.245303Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
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. [-]
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PHYSICAL REVIEW B 91, 245303 (2015)Rights
©2015 American Physical Society
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