Raman scattering by LO phonon-plasmon coupled modes in n-type InP

被引：72
|
作者：
Artús, L
Cuscó, R
Ibáñez, J
Blanco, N
González-Díaz, G
机构：
[1] CSIC, Inst Jaume Almera, E-08028 Barcelona, Spain
[2] Univ Complutense, Fac Fis, Dept Fis Aplicada 3, Madrid 28040, Spain
来源：
PHYSICAL REVIEW B | 1999年 / 60卷 / 08期
关键词：
D O I：
10.1103/PhysRevB.60.5456
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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. [S0163-1829(99)10431-4].
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页码：5456 / 5463
页数：8
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