Band gap and heterojunction discontinuities of pseudomorphic Si1-x-yGexCy alloy layers on Si(001)

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	Band gap and heterojunction discontinuities of pseudomorphic Si1-x-yGexCy alloy layers on Si(001)
	Wu, L. Q. ; Huang, M. C. ; Zhu, Z. Z. ; Li, K. H. ; Li KH(李开航)
刊名	http://dx.doi.org/10.1063/1.368278
	1998-08-15
关键词	SI GE SILICON SI1-YCY STRAIN SYSTEM
英文摘要	We present a theoretical study of the minimum band gap of the pseudomorphic Si1-x-yGexCy ([C] less than or equal to 9%) alloy layers grown on Si(001). We also investigate the valence-band offset and conduction-band offset at the strained Si1-x-yGexCy /Si(001) heterointerfaces, in the framework of the average bond energy theory in conjunction with the deformation potential method. Self-consistent calculations are based on the local density functional theory, ab initio pseudopotentials and the virtual-crystal approximation. Our results show the correct tendency and order of magnitude compared with most of the theoretical and experimental data. It is encouraging to find that the tendencies of the minimum band gap and band offsets with the alloy composition and lattice mismatch are changed suddenly at the critical point due to the difference of the strain properties at the two sides of zero lattice mismatch. Our results also indicate that it is possible to obtain a larger conduction-band offset of the Si1-x-yGexCy/Si(001) heterostructure than that of the Si1-xGex/Si(001) heterostructure which offers a new prospect for the development of heterostructure devices compatible with Si integrated circuit technology. (C) 1998 American Institute of Physics. [S0021-8979(98)07715-9].
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/69492]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Wu, L. Q.,Huang, M. C.,Zhu, Z. Z.,et al. Band gap and heterojunction discontinuities of pseudomorphic Si1-x-yGexCy alloy layers on Si(001)[J]. http://dx.doi.org/10.1063/1.368278,1998.
APA	Wu, L. Q.,Huang, M. C.,Zhu, Z. Z.,Li, K. H.,&李开航.(1998).Band gap and heterojunction discontinuities of pseudomorphic Si1-x-yGexCy alloy layers on Si(001).http://dx.doi.org/10.1063/1.368278.
MLA	Wu, L. Q.,et al."Band gap and heterojunction discontinuities of pseudomorphic Si1-x-yGexCy alloy layers on Si(001)".http://dx.doi.org/10.1063/1.368278 (1998).