Absorption Edge in Degeneratep‐Type GaAs
作者:
I. Kudman,
T. Seidel,
期刊:
Journal of Applied Physics
(AIP Available online 1962)
卷期:
Volume 33,
issue 3
页码: 771-773
ISSN:0021-8979
年代: 1962
DOI:10.1063/1.1777165
出版商: AIP
数据来源: AIP
摘要:
Infrared absorption forp‐type degenerate GaAs is studied at room temperature for various hole concentrations. At high absorption coefficients, a Burstein‐like shift is observed for samples doped above 1019/cm3; this shift is interpreted as a decrease in the valence band electron population. A direct transition analysis was made on 1017/cm3material, yielding an energy gap of 1.39±0.02 ev. The free carrier absorption was extrapolated to shorter wavelengths and subtracted from the data. The resulting absorption edges extend to energies beyond the fundamental edge and reveal the presence of an added absorption mechanism.
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