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	Structural ordering and interface morphology in symmetrically strained (gain)as/ga(pas) superlattices grown on off-oriented gaas(100)
	Giannini, C; Tapfer, L; Zhuang, Y; De Caro, L; Marschner, T; Stolz, W
刊名	Physical review b
	1997-02-15
卷号	55期号:8页码:5276-5283
ISSN号	1098-0121
通讯作者	Giannini, c()
英文摘要	In this work we investigate the structural properties of symmetrically strained (gain)as/gaas/ga(pas)/gaas superlattices by means of x-ray diffraction, reciprocal-space mapping, and x-ray reflectivity. the multilayers were grown by metalorganic vapor-phase epitaxy on (001) gaas substrates intentionally off-oriented towards one of the nearest [110] directions. high-resolution triple-crystal reciprocal-space maps recorded for different azimuth angles in the vicinity of the (004) bragg diffraction clearly show a double periodicity of the x-ray peak intensity that can be ascribed to a lateral and a vertical periodicity occurring parallel and perpendicular to the growth surface. moreover, from the intensity modulation of the satellite peaks, a lateral-strain gradient within the epilayer unit cell is found, varying from a tensile to a compressive strain. thus, the substrate off-orientation promotes a lateral modulation of the layer thickness (ordered interface roughness) and of the lattice strain, giving rise to laterally ordered macrosteps. in this respect, contour maps of the specular reflected beam in the vicinity of the (000) reciprocal lattice point were recorded in order to inspect the vertical and lateral interface roughness correlation, a semiquantitative analysis of our results shows that the interface morphology and roughness is greatly influenced by the off-orientation angle and the lateral strain distribution. two mean spatial wavelengths can be determined, one corresponding exactly to the macrostep periodicity and the other indicating a further interface waviness along the macrosteps. the same spatial periodicities were found on the surface by atomic-force-microscopy images confirming the x-ray results and revealing a strong vertical correlation of the interfaces up to the outer surface.
WOS关键词	MOLECULAR-BEAM EPITAXY ; X-RAY-DIFFRACTION ; SURFACE-MORPHOLOGY ; ROUGHNESS ; FILMS ; HETEROSTRUCTURES ; MULTILAYERS ; INGAAS
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:A1997WL49900064
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2428503
专题	半导体研究所
通讯作者	Giannini, C
作者单位	1.UNIV MARBURG, ZENTRUM MAT WISSENSCH, D-35032 MARBURG, GERMANY 2.UNIV MARBURG, FACHBEREICH PHYS, D-35032 MARBURG, GERMANY 3.CHINESE ACAD SCI, INST SEMICOND, BEIJING 100083, PEOPLES R CHINA
推荐引用方式 GB/T 7714	Giannini, C,Tapfer, L,Zhuang, Y,et al. Structural ordering and interface morphology in symmetrically strained (gain)as/ga(pas) superlattices grown on off-oriented gaas(100)[J]. Physical review b,1997,55(8):5276-5283.
APA	Giannini, C,Tapfer, L,Zhuang, Y,De Caro, L,Marschner, T,&Stolz, W.(1997).Structural ordering and interface morphology in symmetrically strained (gain)as/ga(pas) superlattices grown on off-oriented gaas(100).Physical review b,55(8),5276-5283.
MLA	Giannini, C,et al."Structural ordering and interface morphology in symmetrically strained (gain)as/ga(pas) superlattices grown on off-oriented gaas(100)".Physical review b 55.8(1997):5276-5283.

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