Raman scattering by LO phonon-plasmon coupled modes inn-type InP | Zendy

L. Artús | Zendy; R. Cuscó | Zendy; Jordi Ibáñez | Zendy; Noelia Blanco | Zendy; G. González-Dı́az | Zendy

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Raman scattering by LO phonon-plasmon coupled modes inn-type InP

Author(s) -

L. Artús,

R. Cuscó,

Jordi Ibáñez,

Noelia Blanco,

G. González-Dı́az

Publication year - 1999

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.60.5456

Subject(s) - plasmon , physics , raman scattering , condensed matter physics , phonon , raman spectroscopy , scattering , dielectric function , electron , dielectric , spectral line , atomic physics , quantum mechanics

We have studied LO phonon-plasmon coupled modes by means of Raman scattering in n-InP for carrier densities between 6x10(16) and 1x10(19) cm(-3). A line-shape theory based on the Lindhard-Mermin dielectric function that takes into account the nonparabolicity of the InP conduction band as well as temperature and finite wave-vector effects is used to fit the Raman spectra and extract accurate values of the electron density. The results obtained from the Lindhard-Mermin model are compared with the charge density determinations based on the Drude and the hydrodynamical models, and the approximations involved in these models are discussed

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