Premium
Raman Scattering Determination of Free Charge Density Using a Modified Hydrodynamical Model
Author(s) -
Ibáñez J.,
Cuscó R.,
Artús L.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200102)223:3<715::aid-pssb715>3.0.co;2-o
Subject(s) - raman spectroscopy , range (aeronautics) , charge density , computational physics , raman scattering , spectral line , conduction band , charge carrier , series (stratigraphy) , thermal , thermal conduction , molecular physics , physics , electron , materials science , condensed matter physics , optics , thermodynamics , nuclear physics , quantum mechanics , geology , composite material , paleontology
We have carried out a systematic evaluation of the accuracy of the charge density values obtained by fitting a modified hydrodynamical model to Raman spectra. The hydrodynamical model has been extended to provide a more accurate evaluation of wave vector dependence, conduction band nonparabolicity and free carrier thermal distribution effects through an energy dependent effective mass, so that it can be applied to a wide range of carrier densities. We have used this extended model to fit the coupled‐mode Raman spectra obtained from a series of n‐InP samples with electron densities in the 10 17 –10 19 cm —3 range, and the carrier density values obtained follow closely the results of the more elaborate Lindhard‐Mermin model over the whole density range.