Role of nitrogen in the reduced temperature dependence of band-gap energy in GaNAs

被引:112
|
作者
Suemune, I [1 ]
Uesugi, K
Walukiewicz, W
机构
[1] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0600812, Japan
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA
关键词
D O I
10.1063/1.1322633
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have observed a significant reduction in the temperature dependence of the absorption-edge energy in GaNxAs1-x alloys with x <0.04. The effect has been analyzed in terms of the recently introduced band anticrossing model that considers a coupling of the temperature-independent localized states of substitutional nitrogen atoms and the temperature-dependent extended states of GaAs. The model explains very well the alloy composition and the temperature dependence of the absorption-edge energy. We also compare the parameters that determine the temperature dependence of the band-gap energies in GaNAs and GaInNAs alloys. (C) 2000 American Institute of Physics. [S0003-6951(00)00545-3].
引用
收藏
页码:3021 / 3023
页数:3
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