COHERENT-POTENTIAL-APPROXIMATION CALCULATION OF THE VALENCE BANDS OF THE QUATERNARY ALLOY INXGA1-XASYP1-Y

被引：25

作者：

CHEN, AB ^{[1
]}

SHER, A ^{[1
]}

机构：

[1] COLL WILLIAM & MARY,WILLIAMSBURG,VA 23185

来源：

PHYSICAL REVIEW B | 1979年 / 19卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.19.3057

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The empirical bond-orbital model and the coherent-potential approximation (CPA) are used to study the valence-band structures of the quaternary alloy InxGa1-xAsyP1-y in a manner similar to our previous work on the ternary III-V compound alloys. The densities of states and the self-energies are correlated with the bond-energy levels and their fluctuations. The concentration variation of the valence-band edge (at Γ15) obtained in CPA for the quaternaries matched to the lattice parameters of GaAs and InP are compared with the results from the virtual-crystal approximation. The valence band is shown to contribute significantly to the bowing of the band-gap energy of these alloys. © 1979 The American Physical Society.

引用

页码：3057 / 3063

页数：7

共 16 条

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[10]

MOON RM, COMMUNICATION

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